Which of the following is the proper sequence of the menstrual (uterine) cycle?
A) menstrual phase, secretory phase, proliferative phase, ovulation
B) menstrual phase, proliferative phase, ovulation, secretory phase
C) proliferative phase, menstrual phase, ovulation, progestational phase
D) ovulation, menstrual phase, proliferative phase, progestational phase
E) ovulation, proliferative phase, secretory phase, menstrual phase

Question

Quizplus · Accepted Answer

The menstrual cycle sequence starts with shedding the endometrial lining during the menstrual phase, followed by the growth and thickening of the endometrium during the proliferative phase in preparation for ovulation. Ovulation occurs in the middle of the cycle when an egg is released from the ovary. After ovulation, the endometrium becomes more glandular and vascular during the secretory phase in preparation for possible implantation of a fertilized egg. If implantation does not occur, the corpus luteum breaks down, leading to a decrease in hormone levels, which triggers menstruation and starts the cycle over again. Therefore, the correct sequence is menstrual phase, proliferative phase, ovulation, secretory phase.

Which of the Following Is the Proper Sequence of the Menstrual