All articles tagged with #reproduction
A new paper argues that long-duration spaceflight could impair fertility, gamete quality, and embryonic development due to space radiation and microgravity, with potential epigenetic and heritable risks for offspring; experts call for a formal reproductive health framework and ethical guidelines for space research, even though reproduction in space is not currently advocated.
Male antechinus endure marathon matings that can last up to 14 hours as males compete for multiple partners; the extreme energy and stress can suppress the immune system and cause death after breeding, illustrating a high-risk strategy to pass on genes, while females generally live longer.
An international study warns that the space environment—microgravity, cosmic radiation, and circadian disruption—poses risks to fertility and pregnancy, highlighting a lack of standardized policies for reproductive health in space as commercial and governmental missions expand. Researchers call for urgent international collaboration to establish ethical guidelines and protective standards for astronauts, noting that assisted reproductive technologies could assist future research but have not enabled human pregnancy in space.
As space travel grows into a routine enterprise with commercial missions, researchers warn that reproductive health risks, data gaps, and ethical questions must be addressed now, calling for international standards and portable, automated ART tools to support future long-duration missions.
Space researchers say there is no current consensus or standards for reproductive health beyond Earth. A new study calls for international collaboration to map risks (cosmic radiation, microgravity, isolation) and to establish ethical guidelines and governance before any space-based conception or related research, highlighting gaps as humanity plans longer stays in space and commercial ventures expand.
A panel of experts warns that long-duration spaceflight poses significant risks to fertility and embryonic development, and current data are too scarce to guide safety. They urge creating an international framework to study reproductive health in space, develop protective measures and fertility-preservation methods, and establish clear ethical guidelines, while making clear that actual in-space human reproduction is not planned and research will rely on simulations and non-human models.
A study of the epaulette shark finds reproduction does not trigger a rise in metabolic energy use, challenging the idea that shark reproduction is highly energy-intensive. By monitoring oxygen uptake and hormones during egg-laying, researchers observed a flat energy demand, suggesting sharks have evolved efficient reproductive physiology. This adaptation could help sharks persist as oceans warm, with positive implications for coral reef health.
A Finnish study of 14,836 women from the Finnish Twin Cohort finds that those who had five or more children, or none at all, aged biologically faster and had shorter lifespans than those with one to four children, suggesting a U‑shaped link between reproduction and aging. Researchers caution that the historical, Finland-specific cohort (born 1880–1957) may limit applicability to today’s contexts, and that social factors and health histories likely influence aging alongside biology.
Scientists show Greenland sharks have structurally intact retinas capable of detecting light, overturning the long-held belief that they are blind and ultra-long-lived. The research also prompts reevaluation of their age estimates and highlights major gaps—especially in understanding reproduction and migratory behavior—as warming Arctic waters could reshuffle their habitats and conservation needs.
Australian scientists studying epaulette (walking) sharks found that egg production uses no extra energy, challenging the idea that reproduction is always energetically costly. The flat energy demand suggests a unique adaptation that may help these sharks reproduce under environmental stress, with implications for shark populations and reef health amid warming oceans.
Scientists are uncovering new insights into why female fertility declines with age, focusing on how eggs deteriorate and the role of chromosome abnormalities in increasing miscarriage and infertility risks.
A large-scale study finds that preventing reproduction in mammals, through methods like sterilization or contraception, is associated with increased lifespan, highlighting the biological costs of reproduction and its impact on aging across species, including potential insights for humans.
A mouse that went to space aboard China's Shenzhou-21 spacecraft gave birth to nine healthy pups after returning to Earth, demonstrating that short-term spaceflight does not impair mammalian reproductive ability, which is a promising step for future human space exploration.
Scientists have studied Balanophora, a rare, parasitic plant lacking chlorophyll and photosynthesis, revealing its unique evolutionary history, internal adaptations, and reproductive strategies, highlighting its vulnerability and importance for conservation.
Balanophora is a rare, parasitic flowering plant that resembles a mushroom, lacks chlorophyll, and relies on host trees for nutrients, with unique reproductive strategies including seed production without fertilization. Recent studies reveal its ancient origins, reduced plastids, and adaptation to island habitats, highlighting its evolutionary significance and vulnerability due to habitat loss.