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
Which of the following increases GnRH pulsatility 
Select and explain. 
A. Oestrogen, B. Progesterone, C. Androgens, D. None
A: Oestrogen
Answer: A: Oestrogen 
Explanation: Oestrogen increases GnRH pulse frequency.