Agenesis (atresia) of the lower vagina, or thick transverse vaginal septum

Reproduced with permission from: Laufer MR. Structural abnormalities of the female reproductive tract. In: Emans, Laufer, Goldstein's Pediatric and Adolescent Gynecology, 7th ed, Emans SJ, Laufer MR, DiVasta AD (Eds), Wolters Kluwer, Philadelphia 2020. Copyright © 2020 Wolters Kluwer. www.lww.com.