REM sleep can first be observed in humans
A) prior to birth.
B) about two weeks after birth.
C) about six weeks after birth.
D) at about one year of age.

Question

Quizplus · Accepted Answer

REM sleep, or Rapid Eye Movement sleep, can indeed be observed in humans prior to birth. Studies have shown that fetuses exhibit sleep cycles that include REM sleep phases, indicating that this sleep stage begins before birth.

REM Sleep Can First Be Observed in Humans