The hymen is a thin membrane that surrounds the opening of a girl’s vagina. Typically it is shaped like a half moon, leaving space for menstrual blood to flow out of the vagina.
A microperforate hymen is when this thin membrane almost completely covers the opening to the vagina, with only a very small hole in the middle, making it difficult for menstrual blood to flow out.
Patients can be seen by Texas Children's experts in
Pediatric and Adolescent Gynecology.
There may be no symptoms until a girl reaches puberty and begins having difficulty with her periods, because the opening is so small the blood can’t flow out easily.
Symptoms may include:
A microperforate hymen is typically diagnosed either in a newborn baby or at puberty when it causes problems with a girl’s periods.
Diagnoses can be made through a physical exam.