The _________ produce(s) sperm.

Mature sperm are stored in the

Female sex cells, eggs, are produced in the ___________.

When eggs are released, it remains in the _______________ until fertilization or menstruation occurs.

If an egg is fertilized, it will develop into a fetus in the ___________.

Once cell division occurs, the fertilized egg will become a(n) __________.

A network of blood vessels that provide the embryo with oxygen and nutrients and removes waste.

This organ connects the placenta to the fetus:

During which trimester will the fetus triple in size?

Oxytocin is a hormone that causes contractions in pregnant women. When contractions begin, a woman is in

Identical twins form when:

Fraternal twins form when:

Which of the following STI's is curable with antibiotics?

All STI's show symptoms.