THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The hypothalamus begins the process of ovulation by releasing GnRH in a pulsatile fashion. This pulsatile release causes the anterior pituitary to release LH and FSH, which then act on the ovarian follicle.

Detailed explanation-2: -As the LH surge signals ovulation should occur within 24 to 36 hours, detecting the LH surge (color change) can help determine the most fertile time in a women’s menstrual cycle.