This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Methods - Progestogen-Only Contraception, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is role of progestogens? \nSelect and explain. \nA. Inhibits ovulation, B. Protects against endometrial cancer, C. Causes prompt withdrawal bleeding, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. d. All. (Ref. William's Obstetrics - 21st ed., - 1531; KD Tripathi 5th1- 282, 283)PROGESTINS# Progestin is weak inhibitor of GH secretion from pituitary, decrease frequency of LH pulses & prevents ovulation.# Progestin is palliative in about 50% cases of advanced Ca endometrium.# It is used as prophylaxis for prevention of Ca endometrium.# Irregular bleeding/amenorrhea can occur, if progestin is given continuously.# Progesterone only pills are ideal contraceptive in sickle cell disease.", 'role': 'assistant'}]