Moreover, they subsequently identified the same structure within the sperm cells of zebrafish and in mouse oocytes and sperm. Their findings were published today in Science.

It was previously known that the first specific physical connection between the two germ cells is an interaction of two proteins: the JUNO, which is located on the outer membrane of the female egg ...

"If you take the cytoplasm of the frog egg -- note that the cytoplasm has been homogenized, so whatever spatial structure that was there has been completely disrupted -- and just let it sit at room ...

Scientists have studied female monkey embryos to map how, when and where the egg supply develops. This can now be used to ...

Researchers have developed an innovative technique to rejuvenate aged oocytes, or immature egg cells, to boost their quality, paving the way for improved outcomes for in-vitro fertilization. This ...

Like a sniffer dog, the pollen tube smells its way to an egg cell buried within the female structure, that will eventually become a seed. Tube growth occurs as it continuously extends its tip, a ...

Because stem cells were used, there were no human eggs or sperm needed to develop the embryo structures — and they cannot develop into a viable living being.