Transverse vaginal septum is a vaginal plate that evolves during the embryonic period from the urogenital sinus, the vaginal bulb, to the cephalic end of the vagina, and is obstructed during the luminalization from the bottom to the top, resulting in an incomplete or incomplete luminalization of the vaginal septum. The transverse septum may occur in the higher part of the vagina and may be partially atretic, which may not affect sexual life and may allow conception, but may interfere with delivery of the fetus during labor and delivery, so a transverse septotomy is recommended. Clinical manifestations of transverse vaginal septum The clinical manifestations of transverse vaginal septum depend firstly on the presence or absence of a small hole in the septum and secondly on the height of its position. The thickness of the septum vaginalis varies from very thin, paper-like, to thicker. Most of them have a small hole in the center of the septum, sometimes only through a fine probe, and the menstrual blood can flow out without symptoms until after marriage, when it is discovered due to difficulty in sexual intercourse or obstruction of the fetal head during delivery. If there is no hole in the septum, symptoms will occur once menstrual blood is trapped after menarche. When examining the vaginal septum, the first thing to look for is the presence of a small hole in the septum (often in the central part), and if there is a hole, a probe can be inserted into the septum to investigate the width and depth of the vagina above the hole to make a diagnosis. Incomplete vaginal septum is common and is often ignored without clinical symptoms.