A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.

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 ...

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 function of the male reproductive system is to produce sperm cells - male gametes - and release them inside a female. The male reproductive system has two testes (singular: testis).

The Male Reproductive Medicine and Surgery fellowship is a one-year fellowship under the mentorship of Larry Lipshultz, M.D., professor of urology and the Lester and Sue Smith Endowed chair for ...

DENVER--(BUSINESS WIRE)--Posterity Health, the leader in male reproductive and hormonal health, has secured $13 million in Series A funding to expand access to comprehensive care for men nationwide.

A group of CSU researchers aims to find out how fire smoke affects the fertility of the firefighters on the frontlines of wildfires.