This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Antimullerian hormone levels, during menopausal transition 
Select and explain. 
A. Remain constatn, B. Decrease, C. Increase, D. Varies
B: Decrease
Answer: B: Decrease 
Explanation: Anti mullerian hormone levels decrease markedly and progressively across menopausal transition.