The luteal phase occurs
A)on day 15.
B)during days 6 - 13.
C)on day 14.
D)during days 15 - 28.
E)anytime through the cycle.

Question

Quizplus · Accepted Answer

The luteal phase occurs during days 15 - 28 of the menstrual cycle. This phase is characterized by the formation and development of the corpus luteum which produces progesterone to prepare the uterus for possible implantation of a fertilized egg. If implantation does not occur, the corpus luteum degenerates, causing a drop in progesterone levels and resulting in the shedding of the uterine lining (menstruation) to start a new cycle.

The Luteal Phase Occurs