This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and Reproduction, Subject name: Physiology
Which of the following is not seen in humans 
Select and explain. 
A. Estrous Cycle, B. Menstrual Cycle, C. Endometrial cycle, D. Ovarian Cycle
A: Estrous Cycle
Answer: A: Estrous Cycle 
Explanation: Ans (a) Estrous Cycle(Ref: Ganong, 25th ed/p.403)Estrous Cycle is seen in animals.It has three phases namely,#Proestrus - ovarian follicle enlarges#Estrus - period of sexual receptivity#Metestrus - postovulatory phase#Diestrus - a short period of inactivity before next proestrus