Fertilization begins when sperm navigate to an egg, guided by chemical signals ... The study has been published in Cell.

This is important for fertility. To conceive, a sperm cell must fertilize a mature egg. While an ovulated egg moves from the ...

The chromosomes of sperm cells are tightly packaged into a complex ... tract and across the zona pellucida surrounding the egg. It may also be that the nucleoprotamine structure protects the ...

Infertility is a major global challenge associated with physiological and psychological impact. Genetic mutations that affect ...

For any animal, releasing sperm cells requires a bit of time ... Most fish species mate using external fertilization. The female will deposit eggs outside of the body, usually near the bottom ...

New research from the University of Sheffield reveals how marijuana use affects sperm quality and shape, potentially ...

(d) “Female” means a person belonging, at conception, to the sex that produces the large reproductive cell. (e) “Male” means ...

Two weeks after a human egg is fertilized, primordial germ cells (PGCs), which develop into sperm and eggs, are formed. In six to 10 weeks after fertilization, PGCs differentiate into pro ...

Genetic changes are a significant cause of infertility, impacting over 15% of the global population. TLE6, a major protein ...

Researchers explored the role of the TLE6 protein in male fertility using a novel mouse model. TLE6 deficiency caused ...

All new babies start as an egg and a sperm, but where do those two cells come from in the first place? Your reproductive organs produce the sex cells that make a baby. Sperm cells begin their life ...