How is Congenital Vaginal Obstruction Found?

It is most often found in a newborn. The doctor finds abdominal or genital swelling because the vagina is filled with fluid.

An ultrasound or MRI can confirm the cause of the swelling. Or, a needle would be inserted into the area (or mass if there) to inject dye for an X-ray, or to withdraw fluid for testing.

If there is no mass or urinary signs, it might not be found until puberty. At that time, the girl will not pass blood during her period even with normal ovulation. She may also have pain and swelling that comes and goes from the buildup of menstrual blood behind the block.