Transvaginal septum is a congenital defective disorder. The transverse vaginal septum is caused by the evolution of the vaginal plate during embryonic growth of the urogenital sinus, the vaginal bulb, towards the cephalic end, which is obstructed during luminalization from the bottom up and does not pass through or is not fully luminalized. It often occurs at the junction of the upper and middle third of the vagina, but also occurs anywhere in the vagina up to the tip of the vagina, near the cervix. Complete transverse septum is rare and may result in vaginal atresia; it usually has a small hole in the center or lateral aspect of the septum, which varies in size. The transverse vaginal septum is caused by the vaginal plate that evolves during embryonic life from the urogenital sinus, the vaginal bulb, which proliferates and grows towards the cephalic end, and is obstructed in its luminalization from the bottom up, resulting in an incomplete or incomplete luminalization of the transverse vaginal septum. It often occurs at the junction of the upper and middle 1/3 of the vagina, but can also occur anywhere in the vagina up to the tip of the vagina, near the cervix. It may be due to a lack of penetration of the caudal end of the paramedian tubules on both sides where they meet the urogenital sinuses. Complete transverse septum is rare and may result in vaginal atresia; there are usually small holes in the central or lateral part of the septum, which vary in size and interfere with the drainage of vaginal fluid and menstrual blood.