HealthWomen are less likely to get pregnant for two years after a concussion Women with concussion are less likely to conceive in the two years after their head injury than women who injured another part of their body News
HealthSperm have a weird way of swimming and we only noticed after 300 years For 300 years we’ve assumed sperm swim by beating their tails symmetrically, but in reality sperm rotate like a corkscrew while beating their tails asymmetrically News