Q. Menstrual flow occurs due to lack of :
(a) Vasopressin
(b) Progesterone
(c) FSH
(d) Oxytocin
Solution :
Correct option : D Explanation for the correct option: 1. Menstrual flow occurs due to the lack of hormone progesterone, as this hormone helps in maintaining the pregnancy. 2. After ovulation, graafian follicle transforms into corpus luteum. 3.The Corpus luteum produces the progesterone, which is required to maintain pregnancy. So, Menstrual flow occurs due to a lack of progesterone.