Zoology - Human Reproduction Question with Solution | TestHub

LH and FSH both increase during the follicular phase.

The first day of menses is identified as cycle day one. Estrogen is at a low point. Therefore, the pituitary secretes FSH and LH, a process which actually begins before the onset of menses. These hormones, in turn, stimulate the growth of several ovarian follicles, each containing one egg.