Have you ever wondered what happens in the very first days after fertilisation, before a pregnancy test even turns positive? Many women know conception begins with an egg and sperm, but few understand ...

A mouse embryo study found that partial depletion of intracellular ZP2 delayed blastocyst formation, reduced trophectoderm ...

After the 8-cell stage, mammalian embryos undergo what is called compactation, where the cells bind tightly to each other, forming a compact sphere. After compactation, the embryo is in the morula ...

It’s obvious from yesterday’s vote that embryonic stem cells will continue to split the country (California versus Washington DC, for one thing). But in an ironic bit of timing researchers at the ...