Human embryos have been developed from eggs created from adult skin cells – a feat that had previously been achieved in mice. This could one day provide a way for gay couples or women with fertility ...

This could be egg-cellent news for women struggling with infertility. A research team from Japan says it has developed a new egg maturation technique that may improve in vitro fertilization (IVF) ...

Human egg cells are often prone to chromosomal errors. As women age, the error rate increases sharply — and can contribute to infertility, pregnancy loss, and ...

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 ...

The head of a Seoul fertility clinic associated with an embattled Korean stem cell researcher said yesterday that he paid 16 women for their eggs, according to a South Korean newspaper report. Sung Il ...

Our cells constantly receive DNA damage from factors such as ultraviolet rays, irradiations, toxins and chemicals. For women, that can lead to poor egg quality, which in turn can cause infertility, ...

The ticking of the biological clock is especially loud in the ovaries — the organs that store and release a woman’s eggs. From age 25 to 40, a woman’s chance of conceiving each month decreases ...

In mice, female germ cells can develop into viable ova in male testes, Japanese researchers report this week. Their paper in PNAS suggests that sex determination occurs early in embryonic development ...

Sperm cells are known to prefer cooler temperatures. For quite some time, a puzzling question for scientists has been: how do temperature-sensitive swimmers actually operate effectively within the ...