Microscopy image of a PGA at day 8 showing the early tissues supporting the embryo, including the amniotic sac and the yolk sac-like structures, surrounded by (extra-embryonic) mesoderm tissue.

Pregnancy is a time full of wonder, excitement, and sometimes a bit of worry. The amniotic sac is one of the most fascinating parts of this journey. It is a thin but strong membrane that naturally ...

A group of scientists has now demonstrated the presence of precursors of the placenta and the amniotic sac in synthetic embryos they created from mouse stem cells. In their effort to understand the ...

When your baby stretches, kicks, or rolls inside the womb, a lot more is happening that you might not even imagine or feel from the outside. Each movement creates subtle changes inside the amniotic ...

The first few weeks after sperm meets egg still hold many mysteries. Among them: what causes the process to fail, leading to many cases of infertility. Despite the importance of this critical stage, ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Many factors, including genetics, stress, and environmental exposure, can shape pregnancy and fetal development. Physicians who care for pregnant patients and their babies before and after birth work ...

This is the incredible moment a baby girl born still in the amniotic sac punches her way out. Known as a “en caul birth,” this sort of delivery takes place around one in 80,000 births. The births are ...