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 ...

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 ...

Berlin, Germany: Killer whales, giant pandas, cheetahs and black-footed ferrets are just some of the endangered species that are benefiting from advances in reproductive technology, the 20th annual ...