It doesn't: By definition, an imperforate hymen has no opening or openings for menstrual blood to flow. However, someone may have multiple small openings rather than one larger central opening. If so, menstrual flow can be normal.
Answered 10/6/2019
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3 doctors weighed in across 2 answers
3 doctors weighed in across 2 answers
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A doctor has provided 1 answer
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