D2I2.
congenital

Haematocolpos

Hematocolpos is a medical condition in which the is pooled with blood due to multiple factors leading to the blockage of menstrual blood flow. The medical definition of hematocolpos is "an accumulation of blood within the vagina". It is often caused by the combination of menstruation with an imperforate hymen. It is sometimes seen in Robinow , didelphys, or other anomalies.

Underlined words are explained — tap any of them.

Plain-language summary adapted from Wikipedia. Not medical advice.