Sperm Lose Direction in Microgravity, Prompting Space Reproduction Research
Australian researchers used a clinostat to simulate microgravity and found human, mouse, and pig sperm become disoriented, with about a 40% drop in those reaching a simulated egg; microgravity also affected early embryo development in animals, though healthy embryos could form, and progesterone helped guide sperm. The findings underscore the importance of understanding reproduction in space for future Moon/Mars settlements and ongoing space biology programs, while noting radiation and ethical considerations remain challenges.