Ovulation occurs :
Ovulation After estradiol reaches a peak of 200pg/ml and is sustained for about 48 hours, it exes a possitive feedback action for LH surge Final maturation of follicle is obtained by combined effect of FSH and LH Ovulation occurs 24-48 hours after LH surge Ref: D.C. Dutta's Textbook of Gynaecology, 6th edition, page no: 93
Before LH surge
After biphasic rise in body temperature
After ripening of follicle by FSH
Before estrogen peak
Reproductive physiology and hormones in females