Sexual reproduction is essential for mammals to eliminate harmful genetic mutations that build up through cloning, a research ...

As the generations dragged on past the 27th iteration, the birth rate began to silently collapse. By the 57th generation, a mere 0.6 percent of the cloned embryos survived. The 58th generation ...

Sperm may lose their ability to navigate in microgravity, raising new questions about whether human reproduction is possible ...

Even back then, scientists were puzzled. Many prediction models suggested this fish shouldn’t survive beyond roughly 10,000 ...

Some animals have developed body shapes that closely resemble human private parts, often causing confusion when they are ...

In the competitive romance game, mature humpback whales are getting the females more often than their younger rivals because they know how to sing great love songs to them.

The scientists also looked at the effects of exposure to microgravity had on embryo development in the animal models, and the ...

Current World Health Organization (WHO) guidelines typically recommend 2-7 days of abstinence before taking semen samples or ...

A new study suggests humans face barriers to reproducing in space, with microgravity disrupting sperm movement.

Kelly Ripa knew snails were slimy, but she wasn't aware they got down and dirty! During the Tuesday, March 24, episode of ...

Two new studies from Project CETI provide the most detailed account of a sperm whale birth ever recorded, revealing ...

Sperm are produced continuously from puberty onwards and can be stored in the reproductive tract before ejaculation. That ...