THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -2. The follicular phase. The follicular phase starts on the first day of your period and lasts for 13 to 14 days, ending in ovulation. The pituitary gland in the brain releases a hormone to stimulate the production of follicles on the surface of an ovary.

Detailed explanation-2: -The menstrual cycle may be divided into two phases: (1) follicular or proliferative phase, and (2) the luteal or secretory phase. The follicular phase begins from the first day of menses until ovulation. The development of ovarian follicles characterizes this phase.

Detailed explanation-3: -By definition, the menstrual cycle begins with the first day of bleeding, which is counted as day 1. The cycle ends just before the next menstrual period. Menstrual cycles normally range from about 24 to 38 days.