“Our findings show that CFAP91 affects male fertility because it serves as a scaffold for assembling the radial spokes. In ...

There are many potential causes of infertility, and it can be challenging to pin down just what the problem is when a couple ...

There are many potential causes of infertility, and it can be challenging to pin down just what the problem is when a couple ...

LONDON -- British scientists claimed Wednesday to have created human sperm from embryonic stem cells for the first time, an accomplishment they say may someday help infertile men father children. The ...

Researchers showed how what appears to be a tangle of DNA is actually organized into a structure that coordinates thousands of genes to form a sperm cell. The work, published as two papers in Nature ...

Almost every type of human cell is powered by mitochondria, bean-shaped organelles that use oxygen to synthesize usable energy.* These structures evolved billions of years ago from free-swimming ...

In a scientific breakthrough that raises a number of medical and ethical issues, researchers have used stem cells to create living, growing models of a human embryo. Because stem cells were used, ...