The Hymenotomy reference article from the English Wikipedia on 24-Jul-2004
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Hymenotomy

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A Hymenotomy is a minor medical procedure involving the surgical removal or opening of the hymen. It is done to treat imperforate hymen or other situations where the hymen is unusually thick or rigid in order to allow normal menstruation or sexual intercourse.

External links

Imperforate hymen - eMedicine article