How do behavior, morphology and physiology act in concert to improve a male's reproductive success - and why is there so much variation among outcomes within and between species? Aa Aa Aa ...

Have you ever wondered how everyday habits and technology can impact your health? We often think about proper nutrition and ...

An egg (small oval on top of the large white area) develops in an ovarian follicle. Myostatin, a hormone that inhibits muscle growth, also affects the release of eggs in female mice. Credit: Eye of ...

The man might have a lower than average number of sperm in his semen, or the sperm may not be very mobile. Some women don’t produce enough FSH to allow their eggs to mature. The development of ...

A woman in southwestern China who has two reproductive systems has given birth ... produced from two different marriages, the first to a man and then to a woman. The 59-year-old, born in a village ...