During the pregnancy, when will the developing fetus alternate between periods of wakefulness and sleep?
A) In the first trimester
B) By the end of the second trimester
C) Not until the end of the third trimester
D) It depends upon the particular developing fetus.

Question

Quizplus · Accepted Answer

By the end of the second trimester, the developing fetus begins to exhibit cycles of wakefulness and sleep, indicating the development of a basic rest-activity cycle.

During the Pregnancy, When Will the Developing Fetus Alternate Between