Which of the following is a true statement?
A) All mammals have menstrual cycles.
B) The endometrial lining is shed in menstrual cycles but reabsorbed in estrous cycles.
C) Estrous cycles are more frequent than menstrual cycles.
D) Ovulation occurs before the endometrium thickens in estrous cycles.

Question

Quizplus · Accepted Answer

The endometrial lining is indeed shed during menstrual cycles, which occur in some mammals, including humans. However, in estrous cycles, which are common in many other mammals, the endometrial lining is not shed but reabsorbed by the body. This is a key difference between the two types of reproductive cycles.

Which of the Following Is a True Statement