Which of the following hormonal activity is expected immediately prior to Ovulation?: (A) LH surge, (B) FSH surge, (C) Progestrone surge, (D) Estrogen surge
Answer is A. Ovulation occurs due to the effect of increased concentration of LH. In the pre-ovulatory phase of the menstrual cycle, the ovarian follicle will undergo a series of transformations called cumulus expansion, which is stimulated by FSH. This is followed by LH surge.