Humans are sexual, meaning that both a male and a female are needed to reproduce. Each is equipped with specific organs capable of producing specific cells needed to procreate. In conjunction with a ...

The chromosome associated with male development, which is the last mysterious piece of the human genome, has been fully sequenced by a team of more than 100 researchers around the world, including ...

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 ...

Share on Pinterest Researchers have found microplastics in every sample of human and dog testicles they tested in a new study. Image credit: Jovana Milanko/Stocksy. Multiple factors contribute to ...

In the last 50 years, average human sperm concentrations dropped by 51.6 percent, and total sperm counts dropped by 62.3 percent, according to a study published last week in the journal Human ...

BUFFALO, N.Y. — 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 ...

The Department of Health and Human Services (HHS), under the leadership of Robert F. Kennedy Jr., will define sex as an "immutable biological classification" and only recognize two sexes, male and ...