"All collared lionesses have had cubs, signaling successful reproduction," Matthieu Finiels of the Wildlife Conservation Society told the outlet.

Many mountain gorillas keep living - vigorous and socially engaged - for a decade or more beyond the years of reproduction.

For a long time, having children has been a young person’s game. Although ancient records are sparse, researchers estimate that, for most of human history, women most typically conceived their first ...

Researchers reveal that the guinea pig pre-implantation embryo is very similar to the human embryo, spurring a better understanding of infertility and early human development. CRCHUM researcher Sophie ...

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 ...