Towards a Community Roadmap for Future Human Reproduction beyond Earth

01

Current Context for Human Reproduction and Sexual Health in Space — A Global Perspective

We (the authors) assume at some point in the future (over the coming decades to centuries), humanity will become a multiplanetary species (Musk, 2018) — that is, the full human life-cycle, from the first formation of the germline through conception, birth, childhood, adulthood, old age, and death, will happen beyond Earth. Such an expansion of human presence beyond Earth raises profound biological, scientific, ethical, and societal questions regarding human reproduction (Cole et al., 2025). To date, human space missions were conducted primarily by government space agencies for scientific, exploration, and geopolitical purposes (Seylani et al., 2024). In this era of professional astronauts, any consideration of human (and associated mammalian) reproduction in space was viewed primarily as a scientific research activity (Proshchina et al., 2021).

However, with recent developments and trends, the context is shifting rapidly as follows:

Changing costs and frequency of accessing space

Access to space is being revolutionised by significantly reduced financial costs (Buchs & Bernauer, 2023), increasing launch frequencies, and greater payload capacities. This is exemplified by "New Space" models and vehicles like SpaceX's Starship, which have the potential to transport many tens of, potentially more than a hundred, people into space per flight (Shammas & Holen, 2019). The presence of multiple actors in space logistics and transportation is driving down costs, a trend that continues as competition intensifies (Wooten & Tang, 2018).

Broadening of access to space

The rapid broadening of access to space means it is no longer solely the domain of professional astronauts. Future spacefarers will have very different motivations for being in space and varying approaches to compliance with peer and societal norms. Ensuring people and communities can thrive in space requires proactive consideration of issues related to sexual health and sexual activities (Layendecker, 2016; Layendecker & Pandya, 2018).

Multiplanetary ambitions

Governments and private players aim to establish bases on the Moon (Zhang et al., 2023) and Mars (Neukart, 2024), meaning human populations will soon be spending considerable, extended periods of time living and working beyond Earth.

Space tourism and sexual health

As orbital space tourism and even space hotels (Mehran et al., 2023) are expected to become operational within the coming decade, there is a pressing need to explore and mitigate unplanned conceptions. It is highly plausible that future leisure spacefarers may engage in sexual activities that could lead to intentional or unintentional conception beyond Earth (Cullen et al., 2023).

Biological and physiological challenges

Decades of research indicate that microgravity and cosmic radiation significantly affect mammalian reproductive processes, which serve as a critical proxy for understanding human reproduction (Gimunová et al., 2024; Lung et al., 2026; Mishra & Luderer, 2019). We know from evidence in rodent and amphibian models that factors such as oocyte maturation (Ge et al., 2025; Miglietta et al., 2023), sperm motility (Ahrari et al., 2022; Boada et al., 2020), and early embryonic cell differentiation (Ruden & Rappolee, 2024) are compromised in space. However, there is still a vast amount we do not know. Furthermore, beyond conception and early embryonic development, other critical aspects of the full human life-cycle — such as early childhood development and the ageing process — have hardly been considered in existing space research. Historically, research in this area has been severely constrained by a limited number of flight opportunities, resulting in small sample sizes and a lack of coordinated, long-term experiments. Looking forward, the "New Space" paradigm offers the potential for a significantly greater scientific return (Fiore & Elvis, 2026), allowing for the coordinated, larger-scale experiments needed to start addressing our major knowledge gaps regarding the effects of altered gravity and increased cosmic radiation exposure on the human life cycle.

Earth-bound medical benefits

It is also possible that studying human reproduction in the extreme environment of space may yield spin-offs for terrestrial medicine (Sutton, 2021). For instance, the development of automated, miniaturised, and robust In Vitro Fertilisation (IVF) and associated technologies anticipated for future space communities (SpaceBorn United, 2026a) could significantly improve the accessibility, affordability, and success rates of fertility treatments on Earth. From a scientific viewpoint, this research may not only help humanity thrive beyond Earth but may also drive innovations that address complex medical, fertility, and psychological issues associated with reproduction on Earth (Prasad et al., 2020; Sadier et al., 2025).

Societal evolution

Different human societies have distinct cultural sensitivities regarding sexuality and the process of human reproduction. As space access broadens to include a larger and more diverse representation of humanity, it presents an opportunity to conduct culturally inclusive studies on human reproduction, sexuality, and sexual health in space.

Reproductive rights and justice

The prospect of space settlement introduces legal and ethical dilemmas regarding the rights of the unborn child. Conceiving a child in a highly hazardous space environment — characterised by dangerous radiation levels and microgravity — will face intense societal scrutiny (Szocik et al., 2018).

"We appear to be at a major crossroads or transition point: moving from the past sixty-plus years where humans in space had little relevance to human reproduction outside of scientific curiosity, to a near future where humans from diverse backgrounds will be living in space and where aspects of human reproduction and sexuality will be operationalised or normalised."

We propose that human society is currently poorly prepared for this transition. The speed and pace at which technology and changing global geopolitics are evolving mean that humanity's ability to access and live in space in the near future has outstripped our scientific, ethical, and operational understanding of the reproductive consequences. Therefore, there are significant risks of unexpected consequences emerging across scientific, ethical, and operational domains. Consequently, timely, proactive, and coordinated action is required to address these impending challenges, and which forms the basis for the work presented here.

02

The Proposed Need to Network Global Activities and Roadmap Proposed Activities and Milestones

Addressing the challenges outlined in Section 1 requires a consolidated, timely effort from a broad and diverse range of communities. Currently, many scientists, engineers, technologists, reproduction professionals, entrepreneurs, ethicists, and futurists worldwide are exploring these fields, yet their activities are often isolated within specific disciplines, sectors, and national boundaries. This lack of a unified community means that research and policy development are frequently disjointed. Furthermore, a divide between spacefaring and currently non-spacefaring nations limits global stakeholder engagement and diverse representation.

Consequently, critical research into the effects of the space environment on human and mammalian reproduction remains highly fragmented, meaning the limited resources currently deployed across the globe are often used inefficiently. An indicator of this historical lack of global coordination is the landscape of international scientific gatherings. While broad aerospace and space medicine conferences frequently occur, there has been an absence of dedicated, interdisciplinary events focused specifically on human reproduction beyond Earth. This absence may reflect a longstanding legacy in which reproductive topics have historically been regarded as secondary priorities relative to other, more immediately operational aspects of spaceflight safety — such as radiation shielding, cardiovascular adaptation, or musculoskeletal integrity — concerns that, given the short duration of early missions and the professional profile of their crews, naturally commanded greater urgency and institutional attention.

If a framework existed to connect and encourage these isolated activities, the global community could better utilise its limited resources, ensuring that the collective impact is far greater than the sum of its individual parts. To achieve this, we propose the development and subsequent maintenance of a public-domain, community-led roadmap focused on advancing knowledge of human reproduction beyond Earth. Therefore, the framework would comprise both the roadmap and the related community building and networking activities. To clarify, in this context, we define this "roadmap" to represent a strategic, evolving tool designed to identify critical knowledge gaps, align global research priorities, and map out necessary interdisciplinary milestones. This roadmap is envisaged as a practical and living (i.e., maintained) tool to pragmatically network global activities and address the complex issues raised in the previous section.

Furthermore, we anticipate that the ongoing, collaborative process of developing, implementing, and maintaining this roadmap will naturally foster the development of an emergent, unified global community — one dedicated specifically to the scientific, ethical, and translational challenges surrounding human reproduction beyond Earth. By actively bridging a wider array of disciplines and geographies, this community can ultimately replace the fragmented silos that currently characterise the domain.

Ultimately, the goal of this roadmap is not to dictate rigid rules for future spacefarers, operators, and societies, but rather to serve as a shared navigational tool. By systematically exploring interconnected domains — the biological processes of reproduction, and the medical and operational protocols relevant to sexual health — this roadmap aims to help build a comprehensive foundation of knowledge. This will, in turn, empower and inform future decision-makers, stakeholders, and operators to make better-informed choices regarding what is safe, ethical, and appropriate for human expansion into space.

Foundational principles

To bring this collaborative vision to life, the roadmap is built upon several foundational principles:

• Fostering inclusive collaboration. While government space agencies often remain cautious about addressing human reproduction directly, the rapidly advancing commercial space sector and independent research communities are potentially freer to engage. A community-led roadmap actively bridges these differences, providing a neutral, shared space where all can contribute equally, driven by shared and emergent goals rather than top-down directives.
• Amplifying global resources. By gently aligning global activities towards shared milestones, the global community can minimise duplicated efforts and pool limited resources much more effectively. Crucially, this collaborative approach ensures that diverse, cross-cultural perspectives are woven directly into the foundation of multiplanetary reproduction.
• Engaging regulatory and governing bodies. Much like think tanks that inform and shape public policy without holding direct regulatory authority, the emerging space reproduction community is positioned to play an analogous role in human spaceflight — generating evidence-based knowledge, framing key questions, and raising awareness on reproductive topics that can then inform the decisions of governing and regulatory bodies. It therefore remains essential to actively engage with space agencies. Ultimately, national and international agencies are the bodies that will make binding decisions, establish regulations, and provide oversight. Therefore, the roadmap must actively foster dialogue with both major space entities (such as UNOOSA, NASA, and ESA) and global and national health and reproductive oversight bodies (such as the World Health Organisation, or national fertility regulators like the HFEA in the UK or ASRM in the US). This ensures that the roadmap's ongoing development is not only inclusive but also directly aligned with the institutions that will eventually govern human expansion into space.

03

A SpaceBorn United Network to Initiate and Coordinate Activities Towards a First Roadmap Iteration

Recognising this void in global coordination and dedicated forums, SpaceBorn United (SBU) (SpaceBorn United, 2026b) initiated efforts to actively bridge these isolated disciplines and foster a global community. SBU is an organisation based in the Netherlands that focuses on advocating for the timely consideration of human reproduction beyond Earth and studying its various biological stages in space. Over the past decade, SBU has actively cultivated a growing and informal but broad network through proactive media engagement and the organisation of events and meetings. Scientifically, SBU's research is centred on its ARTIS (Assisted Reproductive Technology In Space) programme (SpaceBorn United, 2026a), which investigates how assistive human reproduction technologies can be adapted and leveraged for use beyond Earth, thereby helping to capture and elevate emerging thoughts and insights from this unique perspective.

Building upon this foundation of research and global community engagement, SBU and its growing network of international partners and affiliates recognised the pressing need for the coordinated activities proposed in Section 2. To transition from isolated discussions to actionable, unified progress, SBU founded the Space Reproduction Roadmap Consortium (SRRC). The immediate goal of the SRRC — supported by founding partners including Ghent University Hospital, Belgium (UZ Gent); Progenesis, La Jolla, USA; Space Exploration Strategies (SES), Texas, USA; and the Earthlight Foundation, Austin, USA — was to initiate the development of a first iteration of a roadmap for Future Human Reproduction beyond Earth.

The first step was to propose the foundational pillars for an initial version of the roadmap which are outlined in Section 4, followed in Section 5 by the methodology used to convene the First SRRC Symposium of multi-domain experts to explore and debate the route to the production and contents of a roadmap version 1.0. The resulting outputs of this initial exploration in the form of proposed building blocks for the roadmap and its key milestones form the core of the remainder of this document.

04

The Proposed Four Foundational Pillars for an Initial Roadmap

To successfully transition from fragmented research to a coordinated and aligned position, the SRRC recognised that human reproduction in space cannot be approached merely as an isolated biological challenge. Rather, it is a highly complex, systems-level problem requiring an integrated, multidisciplinary architecture. Consequently, to ensure a holistic approach and to provide a structure for both the roadmap itself and the inaugural or First SRRC Symposium (detailed in Section 5), this is organised around four interconnected, foundational pillars. These four pillars emerged out of initial discussions within the SRRC leading up to the symposium.

While this structure is designed to eventually support the full "germline-to-grave" human life-cycle, the activities and milestones detailed within these pillars leading to an initial version (v1.0) of the roadmap are intentionally constrained to the "gamete-to-birth" stages. This constraint enables a more focused and achievable initial activity. Future iterations of the roadmap will not only expand the scope of these initial four pillars but are also expected to introduce additional pillars — such as those dedicated to psychology, societal dynamics, and sexual health — to fully encompass the complete continuum of human reproduction beyond Earth.

The initial four pillars are:

1. Biomedical Science. Investigating gametogenesis, fertilisation, and embryonic development under conditions of microgravity, altered gravity, and elevated cosmic radiation, utilising both human data, mammalian proxy models, and exploring future clinical reproductive medicine strategies.
2. Space Technology. Developing or accessing the necessary space-based biological-support and research infrastructure, including automated IVF platforms, microfluidic "organ-on-a-chip" devices, and ground-based space analogues.
3. Ethics & Legal. Addressing bioethical standards, the legal rights and protections of unborn spacefarers, and the development of internationally agreed regulatory statutes and societal norms to govern human reproduction beyond Earth.
4. Space Business & Geopolitics. Establishing sustainable funding models to support the roadmapping activity and its implementation, navigating complex international intellectual property (IP) considerations, and exploring the geopolitical implications of multiplanetary expansion.

05

Methodology for the First SRRC Symposium to Explore and Debate Development of a Roadmap Version 1.0

The following approach was taken to organise and structure the First SRRC Symposium. The objectives of the symposium were to assemble a representative selection of domain experts and debate and explore the production of a roadmap to capture the emerging building blocks to produce a roadmap version 1.0. The following methodology was used:

Initial conceptualisation

In early 2025, preliminary discussions within the existing SBU network identified the value of a formalised roadmapping activity. The network concluded that convening a dedicated online symposium would be a suitable approach to gather interdisciplinary insights and establish a foundational consensus. The SRRC emerged from this.

Participant selection and symposium organisation

To ensure broad coverage of the complex issues involved, an invited participant list was curated. Rather than relying on a general open call, international experts were specifically identified to provide an appropriate breadth of expertise across reproductive medicine, fertility research, space biology, space technology, bioethics, geopolitics, and law. Ultimately, 40 experts participated and the participant list and their respective affiliations are included as Appendix 1 to this document. The online symposium was held across two half-days on 26th and 28th September 2025, with the split structure designed to allow time for reflection between sessions.

Workshop structure and execution

The symposium was designed to foster iterative, interdisciplinary discussions. Each half-day commenced with introductory presentations and plenary sessions to establish a shared context. Following this, participants were split into parallel, targeted breakout sessions categorised into Biomedical Science, Space Technology, Ethics & Legal, and Space Business & Geopolitics. Within these groups, experts were tasked with identifying core challenges and estimating realistic timelines for roadmap building blocks within the focused scope of the early stages of human reproduction in space. The groups then reconvened in plenary sessions to present, discuss, and debate their respective findings. To ensure the nuances of these debates and the resulting consensus points were captured appropriately, all online sessions were recorded, using automated transcription tools to create detailed records for subsequent analysis. The symposium agenda is included as Appendix 2 to this document.

Exploratory and interdisciplinary framing

The first symposium was intentionally designed as a broad exploratory exercise bringing together experts from biomedical sciences, space technology, ethics, governance, law, and business. In line with established innovation and roadmap-development methodologies, participants were encouraged to initially explore a wide range of possible approaches and solution directions before applying stronger prioritisation criteria. The workshop discussions also operated under the pragmatic assumption that major enabling challenges such as radiation mitigation and gravity countermeasures are likely to continue progressing substantially over the coming decades. This assumption allowed participants to focus on identifying specific challenges and opportunities rather than repeatedly revisiting broader spaceflight constraints. One of the primary objectives of future symposia will therefore be to progressively structure, integrate, prioritise, and phase these early-stage concepts into increasingly coherent and operationally realistic roadmap trajectories.

Future activities and evolution

The production of this initial set of roadmap building blocks forms part of a broader multi-year iterative process, structured around a series of interconnected symposia. These symposia, conducted in both online and in-person formats, are intended to progressively expand in scope, duration, and participant diversity as the initiative matures and organisational experience is built. Each successive iteration of the roadmap will be refined and expanded based on the insights generated through these symposia. The first symposium was deliberately limited in size and duration to ensure effective coordination and establish initial processes and shared context. Subsequent symposia are expected to build on this foundation, incorporating larger expert groups and more extensive interdisciplinary engagement.

Following the symposium, the insights and proposed roadmap building blocks generated by the participants were consolidated into this document and circulated among the participating experts and authors for iterative refinement. To foster transparent community engagement, the finalised version of this document (comprising the context, need, and initial activities towards the development of a roadmap) will be published on a public-domain scientific repository (specifically, the CERN-based Zenodo server), where it will be assigned a permanent Digital Object Identifier (DOI) — specifically https://doi.org/10.5281/zenodo.21078931. This open-access publication strategy ensures that the wider scientific, regulatory, and spacefaring communities can quickly reference, debate, and build upon these foundational steps. Crucially, placing this document into the public domain to invite broader community validation and feedback is an important next step; these diverse global insights will directly drive the continuous revision, refinement, and expansion of the roadmapping activity into the future. To ensure that the document is discussed by a broader audience, upon publication a suitable press release will be circulated to advertise the publication.

06

Initial Roadmap Building Blocks Emerging from the First SRRC Symposium

Based on the discussions and consensus generated during the First SRRC Symposium, the initial building blocks for the development of roadmap version 1.0 have been captured and structured around the four foundational pillars introduced in Section 4. The following subsections detail the core challenges, strategic pathways, and immediate actions required across these pillars to help advance our understanding of the critical early reproductive stages beyond Earth.

Whilst the long-term ambition remains a roadmap to address the complete "germline-to-grave" human life-cycle beyond Earth, this initial activity focuses on working towards an initial roadmap iteration that deliberately focuses on the earliest reproductive stages of pre-conception, conception, and early embryonic development. This provides pragmatic and actionable starting points. It is important to reiterate that this does not constitute roadmap version 1.0, rather a step towards such a roadmap.

Due to the intentionally exploratory nature of the First SRRC Symposium process, certain building blocks reflect early-stage long-term possibilities, discipline-specific perspectives, or enabling capabilities that may ultimately support later roadmapping phases. Future iterations of the roadmap are expected to progressively improve integration, prioritisation, dependency mapping, and timeline structuring through additional symposia and iterative expert feedback loops.

6.1 Biomedical Science

Challenge. Understanding the isolated and synergistic effects of microgravity, partial gravity, and cosmic radiation on gametogenesis, fertilisation, and early pre-implantation embryo development, while establishing robust operational protocols.

Strategic content. The biomedical roadmap should focus on establishing a systematic progression from foundational science to eventual clinical application. The symposium established four distinct biomedical pathways:

1. Prioritising foundational data generation. The consensus highlighted a critical strategic distinction: near-term efforts must focus strictly on generating fundamental data regarding human embryo development in space, rather than immediately pursuing the clinical or "medical path". Gathering robust data on early cleavage and blastocyst formation is essential to build scientific credibility, raise awareness, and secure the necessary funding for later stages.
2. Systematic mammalian proxy baselines. Building on historical research, the community must mandate more extensive data building using rodent and other mammalian models in true space environments. These models are crucial for understanding multi-system biological responses (e.g., fluid transport, bacterial control, and microbiome dynamics) under stress before any human clinical research is sanctioned.
3. In vitro validation and Earth-conceived embryos. While natural conception requires less immediate infrastructure, it exposes the highly sensitive processes of gamete fusion to unmitigated environmental stressors. Consequently, the roadmap prioritises in vitro models. A key milestone is to systematically validate the developmental viability of Earth-conceived embryos launched into space versus those fertilised directly in microgravity, isolating the specific variables that may cause developmental arrest.
4. Agile translational workflows. To accelerate progress, ground-based biomedical research must evolve in tight synchronisation with space equipment developers. By fostering direct, agile communication between biological researchers and hardware engineers, the community can circumvent the bureaucratic paralysis often associated with traditional, large-scale governmental space agency cultures.

Immediate action. Establish baseline viability data by accelerating the use of microfluidic organ-on-a-chip devices and mammalian animal models (such as rodents) in ground-based analogues. Crucially, this must be coupled with a strategy that prioritises early embryonic data generation to secure broader scientific funding and consensus before attempting clinical pregnancy pathways.

6.2 Space Technology

Challenge. Developing miniaturised, bio-secure, and highly automated infrastructure to study the reproductive continuum in space, whilst establishing the biological-support parameters required for eventual off-world gestation.

Strategic content. The technological roadmap should focus on bridging the gap between terrestrial clinical infrastructure and the stringent constraints of spaceflight (mass, volume, power, and crew time). The symposium established four distinct technological pathways:

1. Fractional gravity thresholds in LEO. While advanced habitats with massive rotating modules for 1G artificial gravity are long-term astronautic goals, the immediate requirement is to deploy variable-gravity centrifuges within Low Earth Orbit (LEO). This infrastructure is vital to determine if early reproductive mechanisms observe a biological threshold between microgravity, lunar gravity (1/6G), and Martian gravity (1/3G), allowing engineers to de-risk future planetary surface operations.
2. Microphysiological Systems (MPS) & synthetic models. To circumvent ethical limitations and achieve high-throughput parallel experimentation, the community must transition heavily to "on-a-chip" technologies. The roadmap should advocate for developing a modular toolkit — such as testis-on-a-chip, ovary-on-a-chip, and womb-on-a-chip. Crucially, these must be paired with Synthetic Human Entities with Embryo-like Features (SHEEFs, e.g., blastoids) to ethically model the mechanics of human implantation and placental formation without using viable human embryos.
3. Active exploration & terrestrial leverage. Recognising that the space sector lacks the resources to independently invent advanced Assisted Reproductive Technologies (ART) like artificial wombs, the core strategy must be "active exploration." The space community will continuously monitor Earth-based ART developments and adapt them as "worked examples" for space validation. This iterative process builds operational readiness and creates a feedback loop that may yield terrestrial medical spin-offs.
4. Synthetic hibernation (long-term). The group identified synthetic hibernation (induced torpor) as an emerging, long-term technological strand. As space agencies investigate this for deep-space transit and radiation mitigation via induced hypoxia, the roadmap should systematically assess how such artificially lowered metabolic states impact gamete viability, fetal development, and the reproductive capacity of spacefarers upon waking.

Despite the strong emphasis on MPS, the consensus also reinforced that studying the full nine-month gestation period still necessitates maintaining the technological infrastructure to support whole-mammal populations (e.g., rodents) in space environments.

Immediate action. Prioritise the development and deployment of high-throughput, automated microfluidic "on-a-chip" systems and fractional-gravity centrifuges in LEO, whilst establishing active partnerships with terrestrial fertility researchers to adapt their latest ART platforms for space validation.

6.3 Ethics & Legal

Challenge. Reconciling the long-term necessity of multi-generational spaceflight with the immediate ethical and legal constraints regarding human gametes, embryos, and potential genetic interventions.

Strategic content. The ethical roadmap should focus on establishing a robust framework that can navigate both near-term biotechnological capabilities and long-duration mission paradigms. The group established four distinct ethical pathways:

1. Stepwise protocol for Earth-based analogues. A significant challenge is the lack of universally accepted statutes governing human reproductive research in space. Therefore, the immediate necessity is to enforce a strict, stepwise ethical protocol. This protocol mandates that Earth-based analogues, synthetic embryo models, and mammalian proxies are exhaustively utilised to gather baseline data before any viable human biological material is exposed to the space environment.
2. Mitigating "jurisdictional ambiguity." The symposium highlighted the pressing need to address the risk of ethical fracturing. As commercial space entities operate with increasing agility, there is a risk that private actors might bypass the stringent institutional review boards (IRBs) traditionally mandated by governmental space agencies like NASA, ESA, and JAXA. The roadmap should seek to bridge this gap through a unified approach.
3. Navigating advanced biotechnologies. A crucial debate focused on the ethical boundaries of applying advanced biotechnologies — such as genetic screening, regenerative medicine, or gene therapies for enhanced radiation resistance — at the gamete or early embryo stage. While these interventions might theoretically become necessary for deep-space survival, they introduce profound moral, legal, and human rights complexities regarding germline modification that must be proactively addressed.
4. Long-term, multi-generational perspectives. The discussions acknowledged that the ethical justification for off-world reproductive research must be explicitly tied to intergenerational viability. The appeal of the "longtermist" argument for multiplanetary expansion requires that existing Earth-based bioethics treaties be updated to account for the extreme hazards of space and the unique rights of unborn spacefarers.

Immediate action. Formulate a unified, internationally recognised "Space Bioethics Code of Conduct" focused on the handling, research, and potential genetic modification of gametes and early embryos in space. This framework must bridge the gap between commercial innovation and governmental oversight, providing a transparent, phased approval process for future extra-terrestrial experiments.

6.4 Space Business & Geopolitics

Challenge. Understanding the long-term financial, operational, and implementation requirements of the roadmap while identifying sustainable commercial, philanthropic, and hybrid funding approaches, driving public consensus, and establishing equitable frameworks for intellectual property and international collaboration over a multi-decade timeframe.

Strategic content. Executing a roadmap of the proposed magnitude requires a robust understanding of long-term resource requirements, implementation pathways, commercial opportunities, and stakeholder engagement strategies. The symposium established four distinct business and geopolitical pathways:

1. Strategic storytelling and public consensus. A core theme was the power of narrative to drive change, innovation, and capital acquisition. To unlock global funding, the community must move beyond pure science and leverage mainstream media, inspiring public relations campaigns, and compelling storytelling to normalise the conversation and secure public and political backing.
2. Hybrid funding and democratised investment. The symposium highlighted the need to tap into vast global capital pools through diverse mechanisms. Rather than relying solely on traditional venture capital or government grants, the roadmap advocates for hybrid models. These include philanthropic funds, public-private multinational consortia, and even non-profit crowdfunding platforms to democratise early-stage investment and generate momentum.
3. Leveraging big data and AI for commercial viability. To reduce the immense costs of space biomedical research, the group emphasised integrating big data analytics, artificial intelligence, and advanced sensor technologies. Drawing on terrestrial disciplines like neonatology, leveraging these tech-driven efficiencies can accelerate R&D and generate lucrative, near-term commercial spin-offs for healthcare on Earth.
4. Equitable IP and geopolitical stability. The structure must balance the need for commercial incentives — which are essential to attract large-scale private investment — with broader humanitarian aims. A key strategic milestone is establishing an intellectual property framework that prevents the monopolisation of foundational reproductive technologies, ensuring they remain accessible as a global public good and preventing geopolitical friction.

Immediate action. Develop a coordinated global communications strategy to build public consensus and awareness, while simultaneously exploring the formation of a non-profit foundation or hybrid entity to channel initial philanthropic and crowdfunded investments into foundational big data and biological research.

07

Next Steps Towards a Roadmap and Expected Impact of Roadmap

7.1 Next steps for development, implementation and evolution

To advance towards a first roadmap iteration (Roadmap Version 1) and to then refine, update, and implement this roadmap, the following immediate and near-term milestones have been proposed:

1. Publish and disseminate current document. Enable an immediate broader discussion with the global community to capture feedback, refinements and validations of the activities and outputs up to and including the First SRRC Symposium.
2. Work towards the production of Roadmap Version 1.0. Implement further symposia and community activities to expand upon the current First SRRC Symposium outputs and to produce and disseminate version 1.0 of the Community Roadmap for Future Human Reproduction beyond Earth and seek further public validation, peer validation, and critical feedback from the wider scientific, spacefaring, and other relevant communities.
3. Expand the Space Reproduction Roadmap Consortium (wider community engagement). Actively broaden the membership of the Space Reproduction Roadmap Consortium (SRRC). This includes targeted outreach to stakeholders from currently non-spacefaring nations, diverse cultural groups, and terrestrial regulatory bodies (e.g., WHO, national fertility regulators) to ensure the roadmap remains culturally inclusive and legally sound.
4. Prioritise foundational data generation (biomedical science & space technologies). Begin execution of the immediate biomedical and technological priorities by accelerating the funding and development of Microphysiological Systems (MPS) and automated "on-a-chip" tools. Gathering baseline data on early cellular cleavage in microgravity is the critical first step to building the scientific credibility needed to advance to subsequent roadmap phases.
5. Draft a unified Space Bioethics Code of Conduct (ethical & legal). Convene a specialised interdisciplinary working group to draft an international ethical framework. This document will aim to bridge the gap between rapid commercial innovation and traditional governmental oversight, mitigating the risks of jurisdictional ambiguity in off-world research.
6. Launch a strategic communications and funding campaign (space business & geopolitics). Develop a compelling global narrative and media strategy to normalise the conversation around off-world reproduction. This storytelling approach will be leveraged to attract hybrid investment models, combining private venture capital with philanthropic funds and democratised crowdfunding.
7. Consolidate iterative symposia (evolution & roadmap management). Commit to a regular cycle of international symposia (e.g., annual or biennial). These subsequent gatherings will serve to integrate new empirical data, review technological breakthroughs, and progressively expand the roadmap's scope beyond early embryonic development to encompass the full "germline-to-grave" life-cycle.

7.2 Expected impact

Implementing appropriate roadmaps for future human reproduction beyond Earth will transition the study of human reproduction in space from an isolated, fragmented curiosity into a coordinated, globally recognised scientific and operational priority. By unifying academia, public and commercial activities, and regulatory agencies under a shared framework, this roadmap is expected to help systematically de-risk future multiplanetary expansion and establish bioethical and legal governance. Furthermore, addressing the extreme challenges of beyond Earth reproduction could accelerate terrestrial medical spin-offs — such as advanced, automated IVF technologies and novel diagnostics — providing direct benefits to reproductive healthcare and accessibility on Earth. Beyond an initial roadmap, future iterations of the roadmap will be updated to expand this scope from the current focus on the early stages of reproduction to embracing the full human life-cycle, including gestation, birth, childhood development, and ageing in extraterrestrial environments.

08

Conclusion

For the first time in history, humanity possesses the technological agility, commercial momentum, and scientific tools necessary to ethically and systematically address the fundamental question of our ability to reproduce beyond Earth. The transition toward a multiplanetary species is no longer an abstract concept, and relying on fragmented research or delayed regulatory engagement is no longer sufficient.

"By adopting the proposed community-led roadmapping, this collaborative, interdisciplinary approach will be essential not only to safeguard the health of future spacefarers and cultivate societal readiness but also to drive profound innovations in human development that may yield direct, lasting benefits for healthcare on Earth."