One of the most detailed 3D maps of how the human chromosomes are organized and folded within a cell's nucleus is published ...

What makes someone a "morning lark" or a "night owl?" Why does jet lag hit us so hard, and why do some people struggle each ...

The analysis revealed that about 2 per cent of sperm from men in their early 30s contained disease-causing mutations. That figure rose to between 3 and 5 per cent in middle-aged men (43 to 58 years) ...

Scientists are edging closer to something that once sounded like science fiction: tools that might refresh aging human eggs ...

Ultrastructure expansion microscopy of murine male germ cells reveals the fine molecular structures of centrioles (shown in the enlarged image). DNA is stained in blue, and the chromosome axis in red.

The mammals' mysterious clicks contain a stunning level of complexity, a new study shows. A group of sperm whales (Physeter macrocephalus) swims together in the Indian Ocean. For years, researchers ...

Male infertility is a major issue worldwide and its causes remain unclear. Now, researchers at the RIKEN Center for ...

The sperm is not a passive supplier of genetic material to the egg. A study from Linköping University, Sweden, shows that certain molecules that come with the sperm, so-called micro-RNA, contribute to ...

PORTLAND, Ore. — Researchers have created human embryos by taking nuclei from ordinary skin cells, placing them into donated eggs, and fertilizing them with sperm. The work is a laboratory ...

HINXTON, England — At first glance, the news sounds reassuring: sperm cells accumulate genetic mutations eight times slower than blood cells, making them among the most protected cells in the male ...

In a controversial step that raises the possibility of a new kind of infertility treatment, scientists report that they have produced functional human eggs in the lab that were able to be fertilized ...