Reduction in utero-placental circulation results in:

The embryonic portion of the placenta form from the:

Within the highly invasive Syncytiotrophoblast is located the ________.

At what time of development can the fetal sex first be determined?

The ectodermal cells form the notochord-neural tube which becomes the:

The ectodermal germ layers form the:

Placenta Previa can result when……………..

True/False: At 11- weeks: The intestines have returned to the abdominal region from their site of herniation in the yolk sac.

The digestive system develops from the _________ layer.

During embryonic folding the process that establishes the basic plan for all organ systems is called?