Male and female reproductive systems allow human reproduction ... giving insight to the human body and its capabilities. BBC Teach has thousands of free, curriculum-linked resources to help ...

Male: By the tenth week of pregnancy, a fetus's gender is evident, and by week 14 sex organs have formed. Female: At 20 weeks, a female fetus has a fully developed reproductive system, replete ...

The race will feature sperm samples competing in real-time via high-resolution imaging on a microscopic racetrack modelled on ...

Scientists have discovered microplastics in human ovarian follicular fluid, raising concerns about female fertility. These ...