we interpret these findings to indicate that asymmetrical ovarian steroid secretion , especially of 17 beta-estradiol , may be among the earliest indicators that the dominant follicle , or at least the ovary destined to bear it , is already selected by 5 days before the preovulatory fsh/lh surge in the typical menstrual cycle .
C0029939
ovary
C0025329
menstrual cycle