Reports of falling sperm counts and testosterone levels have fuelled fears over chemicals, pollution and modern lifestyles. But how much do scientists agree on what is affecting male fertility?

In a review article published in the journal Molecular Aspects of Medicine, authors have analyzed current evidence on the impact of obesity on the male reproduction system. They have thoroughly ...

This is read by an automated voice. Please report any issues or inconsistencies here. Male factors contribute to 50 percent of all conception difficulties. A varicocele affects 20 percent of all men ...

Hear the phrase “reproductive politics” and sperm likely won’t be the first thing that comes to mind. But in a provocative new collection of essays, Yale sociologist Rene Almeling and a group of ...

OVER the past few weeks, we’ve been examining each body system in detail. This week and next, we will focus on our final, most vital system: the reproductive system. Our focus this week will be on the ...

Human reproduction requires both male and female gametes. Gametes are special sex cells that contain the genetic information necessary to create a new life. Men produce millions of gametes called ...

Despite their formidable bodies, male gorillas are lacking in one particular area of their anatomy. They have the smallest penises and testes of all apes, and produce a low amount of sperm that ...

Genes associated with male reproductive biology appear to be under relaxed selective constraint in a primate species with low sperm competition.