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
[{'content': 'Which of the following is not seen in humans \nSelect and explain. \nA. Estrous Cycle, B. Menstrual Cycle, C. Endometrial cycle, D. Ovarian Cycle', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]