MEDICAL PHYSIOLOGY

Detailed explanation-1: -This peak in estrogen triggers a brief surge in Luteinizing Hormone (LH), which triggers ovulation within usually 24 hours and occasionally up to 48 hours.

Detailed explanation-2: -In the days before ovulation, there are two hormones that primarily run the show: estradiol (E2) and luteinizing hormone (LH). All about E2: A couple of days before ovulation during an average cycle, there is one growing, thriving follicle which houses the egg that your body will release during ovulation.

Detailed explanation-3: -Estrogen levels rise and fall twice during the menstrual cycle. Estrogen levels rise during the mid-follicular phase and then drop precipitously after ovulation. This is followed by a secondary rise in estrogen levels during the mid-luteal phase with a decrease at the end of the menstrual cycle.

Detailed explanation-4: -FSH tells the ovaries to prepare an egg for ovulation (release of an egg from the ovary). The dominant follicle produces estrogen as it grows (13), which peaks just before ovulation happens (12).