Discover the bizarre facts and fiction about the Virginia opossum's incredible symmetrical reproductive system.

Genetically modified rodents are valuable tools in biomedical research, contributing to our basic understanding of biology and gene function, the role of genetic defects in specific diseases, and the ...

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 ...

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 ...