The energy invested in animal reproduction is as much as 10 times greater than previously estimated when the metabolic load of bearing and caring for offspring is accounted for, according to a new ...

The mating game in the animal kingdom is nothing less than fascinating and somewhat weird. Some species pierce, clone, chew, or even fake their way through the mating process. To make survival ...

Reproductive systems and organs are concerned with sexual reproduction: creating more individuals with contributions from 2 parents and genetically different from either parent. Reproductive systems ...

A protein called COUP-TFII determines whether a mouse embryo develops a male reproductive tract, according to researchers at the National Institutes of Health and their colleagues at Baylor College of ...