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
Time of ovulation is detected by all EXCEPT: September 2012 
Select and explain. 
A. Urine LH, B. Urine FSH, C. Serum progesterone, D. Basal body temperature
B: Urine FSH
Answer: B: Urine FSH 
Explanation: Ans. B i.e. Urine FSH Physiology Best predictor of ovulation: Pre-ovulatory rise in LH In normal menstrual cycle, progesterone is secreted by: Corpus luteum Inhibin is secreted by: Graffian follicle LH precedes ovulation by: 24 hours (Ovulation coincides with LH surge) Ovulatory period: Corresponds to 14 days before next menstruation FSH stimulates: Growth of granulosa cells (measure of ovarian reserve) LH stimulates: Follicle rupture and ovulation.