Yolk sac is then infiltrated with a system of blood vessels ... Eventually the free edges of the folds fuse and completely enclose the body of the embryo in the amniotic cavity. When the amniotic ...

Read on for more about amniotic fluid, where it comes from, and how it helps your baby. During pregnancy, your baby develops inside a bag or sac called ... from your body cavity and serum ...

Yolk sac is then infiltrated with a system of blood vessels ... Eventually the free edges of the folds fuse and completely enclose the body of the embryo in the amniotic cavity. When the amniotic ...