True about timing of LH surge :: (A) Occur 12 hour before ovulation, (B) Occur 24 hour before ovulation, (C) Occur 12 hour after ovulation, (D) Occur 24 hour after ovulation
Answer is B. LH surge initiates luteinization acting through its receptors about 24-48 hours prior to ovulation. Ref: D.C. Dutta's Textbook of Gynaecology, 6th edition, page no: 92