Question

Which one of the following is the correct matching of the events occurring during menstrual cycle?

• A. Menstruation: breakdown of myometrium and ovum not fertilized
• B. Ovulation: LH and FSH attain peak level and sharp fall in the secretion of progesterone
• C. Proliferative phase: Rapid regeneration of myometrium and maturation of Graafian follicle
• D. Development of corpus luteum: Secretory phase and increased secretion of progesterone

Hint:

\textbf{Corpus luteum $\rightarrow$ Secretory phase $\rightarrow$ Progesterone dominance}. Always remember: endometrium (not myometrium) regenerates during the menstrual cycle.

Answer 1

The Correct Option is D

Step 1: During menstruation, the endometrium (not myometrium) breaks down. Hence, option (A) is incorrect.
Step 2: During ovulation, there is a peak in LH (and a small rise in FSH), but progesterone does not fall sharply; it rises after ovulation. Hence, option (B) is incorrect.
Step 3: In the proliferative phase, there is regeneration of the endometrium (not myometrium) along with maturation of the Graafian follicle. Hence, option (C) is incorrect.
Step 4: After ovulation, the ruptured Graafian follicle develops into the corpus luteum, which marks the secretory phase. This phase is characterized by increased secretion of progesterone to prepare the uterus for implantation.