Question

The gestational age of the embryo is measured from when the sperm and egg unite.

Answer 1

D.
numbs the mother from the waist up

Gestation is the process where the embryo or the fetus inside of a female is developing to become a fully developed infant. Hence, the period is called the gestation period and approximately is 9 months. 
Gestation can take place at numerous numbers which now is called multiple gestation.