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 FSHPhysiologyBest predictor of ovulation: Pre-ovulatory rise in LHIn normal menstrual cycle, progesterone is secreted by: Corpus luteumInhibin is secreted by: Graffian follicleLH precedes ovulation by: 24 hours (Ovulation coincides with LH surge)Ovulatory period: Corresponds to 14 days before next menstruationFSH stimulates: Growth of granulosa cells (measure of ovarian reserve)LH stimulates: Follicle rupture and ovulation.