Scientists have reported it for decades: overpopulation can impair reproduction. Crowded chickens lay fewer eggs. Crowded ...

It is an awkward idea, but a couple's ability to have kids may partly depend on who else is present. The reproductive tracts of males and females contain whole communities of micro-organisms. These ...

High levels of vitamin D are linked to improved fertility and reproductive success, a study of wild sheep has found. The study, carried out on a remote Hebridean island, adds to growing evidence that ...

(Matthias Kulka/The Image Bank/Getty Images) The world is now swimming in so many synthetic chemicals, some scientists think we have already breached our planet's safe limit. Researchers are now ...

Verility Inc., led by co-founder and CEO Liane Hart, has closed Series A funding worth $3.5 million. The round was led by Mountain Group Partners of Nashville, Tennessee, and includes a previous ...

Dr. Thomas Price, a senior lecturer of evolution, ecology and behavior at the University of Liverpool, has had a lot of time to consider how humans are at a disadvantage because of our external ...