Menstrual flow occurs due to lack of

Step-by-step solution

Progesterone - Supports pregnancy. FSH Stimulates gonadal activity called as gonadotrophins. Oxytocin Stimulates contraction in uterus during childbirth. Vasopressin Stimulate resorption of water and electrolytes by the distal tubules, also called as Antidiuretic Hormone (ADH).