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

a.
typically injected into the amniotic fluid
b.
typically injected into the mother's spine
c.
can be self-administered
d.
numbs the mother from the waist up

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. 

The answer is either 3 or 4

Agonist is the answer i believe