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 ...

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.

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 ...

Gastrulation, the process where an embryo reorganizes itself from a hollow sphere into a multilayered structure, is considered a 'black box' of human development. This is because human embryos are ...

In a longitudinal study published in Scientific Reports, researchers investigate the effect of maternal physical activity on the size and growth of the yolk sac during early pregnancy. To this end, ...

What Is a Yolk Sac? A yolk sac is a small pouch made from thin membranes. The yolk sac is one of the first things to develop during pregnancy and one of the first things your healthcare provider will ...