Menstrual flow occurs due to a lack of
Progesterone
The correct option is D.
Explanation for the correct option:
Option D:
Explanation for the incorrect options:
Option A:
Vasopressin is released by the pituitary gland stimulates the resorption of water and electrolytes by the distal tubules and is also called Antidiuretic Hormone (ADH).
Option B:
Oxytocin is released by the pituitary gland and it stimulates vigorous contractions of the uterus at the time of childbirth and milk ejection from mammary glands.
Option C:
FSH is released by the anterior pituitary gland that stimulates gonadal activity and hence is called gonadotropins. Its deficiency will affect the maturation of germ cells.
Final answer: Menstrual flow occurs due to a lack of progesterone.