Failure of chromosomal organization within human egg and sperm cells result in miscarriages and infertility. However, the mechanisms controlling these processes are not understood. The discovery of a ...

Human fertility hinges on a delicate molecular ballet that begins even before birth. UC Davis researchers have uncovered how special protein networks safeguard chromosomes as eggs and sperm form, ...

Who hasn't seen it before: the view through the microscope in which a sperm penetrates an egg cell and fertilizes it. This fundamental step in procreation happens dynamically and seemingly without ...

Xenopus is a type of frog that is commonly used as a model organism in biological research, and their eggs develop outside of the body, making them especially good for studying development.

After fertilisation, the egg cell (purple) releases zinc ions (blue dots), which changes the shape of the green protein on the surface of a sperm. As a result, the sperm can no longer dock to the egg ...

A protein known as MPS1 helps to ensure that a key process during cell division of oocytes—unfertilized egg cells—occurs in a timely manner, RIKEN biologists have discovered. This finding in mice may ...

The artificial cell nucleus (right) constructed using the purified DNA was morphologically very similar to the natural cell nucleus derived from an egg (left). A team led by Professor Kazuo Yamagata ...