Gestation period is another name for:

A) labor and birth.
B) one trimester.
C) six week period after birth.
D) length of pregnancy.

Gestation Period

The duration of time between conception and birth in which an embryo or fetus develops inside the mother's womb.

Length of Pregnancy

Typically refers to the gestation period in humans, approximately 40 weeks from the last menstrual period or 38 weeks from fertilization.