How do the placenta and amnion develop?

1 Answer
May 28, 2015

The placenta and amnion develop in the embryo. They are classified as extra-embryonic membranes and they grow outwards from the embryo.

The amnion, water-proof membrane that surrounds the embryo in a capsule filled with amniotic fluid, and the chorion, produces the umbilical chord, arise from ectoderm and somatic hypomere mesoderm following the process of neurulation.