Polycystic Ovary

Description

Centered in the pelvis, the uterus is rendered in sagittal section with the endometrial cavity and cervix aligned along a single midline axis, then continued inferiorly into the vaginal canal. From the uterine fundus, the uterine (fallopian) tubes extend laterally and curve toward the ovaries, where the infundibulum and fimbriae approach the ovarian surface. Each ovary lies lateral to the uterine body and medial to the pelvic sidewall, and the cortical region is studded with multiple small, round peripheral follicles that create the classic polycystic appearance. PCOS is less about true cysts and more about arrested follicular development, so this ovarian morphology pairs naturally with teaching anovulation, oligomenorrhea, and subfertility. That peripheral distribution of follicles, often described as a string-of-pearls pattern on ultrasound, corresponds to a thickened tunica albuginea and increased stromal volume, changes that track with hyperandrogenism and may complicate ovulation induction. It also sets up a useful contrast with other adnexal pathology, such as functional cysts or endometriomas, where the lesion is typically dominant and distorts the ovarian contour rather than producing many uniform subcortical follicles. Reproductive endocrinology lectures, OB-GYN clerkship handouts, and patient-facing materials on PCOS counseling can all benefit from this full-system context, since it keeps the ovary tethered to the tubes, cervix, and endometrium rather than floating as an isolated organ. Editorial teams can also pair it with imaging figures to bridge gross anatomy and sonographic criteria used in infertility workups. Anatomical accuracy verified by SciePro's Medical Advisory Board.