The choices are;
a. the appearance of the first permanent teeth
b. the appearance of the last permanent teeth
c. rapid development
d. puberty
The answer is c. rapid development. Gestational stage is the time period that a pregnancy needs to exist from conception to natural birth time. In humans, 40 weeks. Gestation is the carrying of an embryo or fetus exclusive viviparous animals. It is typical for mammals.
