Men have nipples, mammary glands and the hormones required, but the ability for male lactation rarely turns on. Here’s why evolution mostly suppresses it.

In a recent review published in Antioxidants, researchers described the implications of exposure to air pollutants on male fertility parameters and sexual health. They further discussed the potential ...

It’s not just about chromosomes. Or reproductive cells. Or any other binary metric. Many genetic, environmental and developmental variations can produce what are thought of as masculine and feminine ...

In a recent study published in the journal Nature Reviews Urology, researchers addressed the most pertinent questions concerning male infertility. They discussed the current understanding of the ...

A mega-study of 117 mammal species reveals that limiting reproduction increases life expectancy by up to 10 percent.

Why does the peacock have such an elaborate tail? This cumbersome trait significantly decreases the male's chances of survival. It only exists because it confers an advantage to its bearer in the form ...