Male fertility rates have been plummeting over the past half-century. An analysis from 1992 noted a steady decrease in sperm ...

Close-up of a female stolon–one of the independent reproductive units–from the worm Ramisyllis kingghidorahi. It has already ...

Before they can document a link between environmental estrogens and health problems in men, scientists will have to identify which chemicals affect the male reproductive system and what health ...

Unlike most animals where the female carries and gives birth to offspring, the male seahorse takes on this role. What makes this unique? This male seahorse defies typical nature's norms.

Scientists have uncovered the genetic underpinnings of one of the ocean's most bizarre animals: a branching marine worm named ...

Sperm is released from the male in a fluid called semen. Semen is alkaline and does not allow the sperm to be completely motile until they reach the female reproductive tract or the vagina which ...

Animal studies have shown exposure to microplastics ... STONE: Of course, testicles are just one part of the male reproductive system. Shanna Swan, a reproductive epidemiologist at Mount Sinai ...

Animal studies have shown exposure to microplastics ... Yu didn't expect microplastics would have penetrated the male reproductive system so extensively, given the tight blood-tissue barrier ...

She has covered weird animal behavior ... with a rare genetic variant that left it with no male or female genitals or reproductive organs. Stock image of a homeless kitten. Hope the kitten ...

The normal function of the male reproductive tract is twofold: to produce spermatozoa and male sex hormones, necessary for sexual development. Testicular function is regulated by the anterior ...