Starting one's sex life and having children at a young age can run in the family. But can pregnancy have beneficial health ...

Clinical data reveals male factors contribute to half of all infertility cases, shifting the focus toward earlier ...

Evolution is always happening — so why can't we see it? A biologist explains the timescale problem, election pressure, and ...

While many of life's mysteries remain unsolved, every biologist can describe the basic processes performed by a living organism, including energy use, reproduction, growth and development. While these ...

Many times, scientists embark on a study looking for evidence for a particular hypothesis, and in the process, they come across something totally unexpected and different from their original purpose.

Northwestern Medicine scientists have discovered that one of the body's most fundamental biological processes—how red blood ...

The human-made cells show many hallmarks of life, but they can't make all their necessary internal structures or divide for ...

What drives these men to reproduce at an industrial scale?

Why do so many men only think about fertility when there is a problem? Perhaps the answer lies in our societal scripts.

Males of the species Drosophila melanogaster pack thousands of almost two-millimeter-long sperm cells into significantly smaller storage organs. A new study reveals how they move in an orderly manner ...

Female fertility depends on the successful growth and maturation of eggs (oocytes) within ovarian follicles. Within these ...