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 ...

President Trump issued an executive order declaring that the U.S. government would only recognize a person’s sex assigned at ...

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 ...

This mating system is found in a few birds and insects ... Several mechanisms have evolved to facilitate a male's reproductive success with females that have multiple mates.

The Alabama Senate Thursday approved a bill defining “sex-based terms” strictly based on biological sex.

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).

It goes to the House, which passed a similar bill last year, the What is a Woman Act by Rep. Susan DuBose, R-Hoover.

Fertilisation close fertilisationThe joining of a male and female gamete. happens if the egg cell meets and joins with a sperm cell in the oviduct. The fertilised egg attaches to the lining of the ...

Hoover, has pre-filed her controversial, “What is a Woman” bill for the 2025 legislative session. DuBose previously ...