The amniotic sac, commonly called the bag of waters, sometimes the membranes, is the sac in which the embryo and later fetus develops in amniotes. It is a thin but tough transparent pair of membranes ...

Viewer discretion is advised. A video from a Spanish hospital captures the moment a baby is born within the amniotic sac, an occurrence that only happens 1 in every 80,000 births. It is also known ...

But it's lovely to look at these pics of one baby boy being born after the other – and to see the second twin being born still in his 'waters' (amniotic sac). The picture above was voted Image of the ...

Amniotic fluid, often called the “water” that breaks, cushions and nourishes the baby during pregnancy. Abnormal levels—too ...

Yolk sac is then infiltrated with a system of blood vessels, carrying nutrients from the yolk back to the embryo. Other extra-embryonic folds expand up over the embryo to form the amniotic folds. The ...