The primary chemical signal causing uterine contraction is

Which hormone is highest in the first trimester of pregnancy?

The fetus has a protective waxy coat called the

The baby exits the vagina in which stage of parturition?

Which hormone is highest in the first trimester of pregnancy?

The baby exits the vagina in which stage of parturition?

The developing digestive system pinches off from the

Somites give rise to

The developing digestive system pinches off from the

After ovulation a mature follicle becomes a