Question Detail
Question
When is there slough off the thick endometrial lining of the uterus caused by sudden decline in estrogen and progesterone? a. Menopause b. Secretory stage c. Menstrual cycle d. Menstrual stage
Correct Answer
Option D is the correct answer.
Detailed Explanation
The sloughing off (shedding) of the endometrial lining is menstruation, specifically the menstrual phase (or menstruation) of the uterine cycle. This occurs when the corpus luteum degenerates (if no pregnancy occurs), causing a sharp drop in estrogen and progesterone levels. This drop causes the spiral arteries to constrict, leading to tissue breakdown and shedding.
Hint
This is the 'period' phase.