Vaginal opening

Last revised by Daniel J Bell on 29 Dec 2020

The vaginal opening, is also known as the introitus (plural: introituses), vaginal orifice, or ostium vaginae (plural: ostia vaginarum) (TA) .

The entrance to the vagina lies in the vestibule of the vulva in the median plane. It has an anteroposterior orientation and is partially covered by the hymen, which usually has a central perforation, for the monthly passage of menses. 

In general when introitus is used without additional qualifying terms it refers to the vaginal opening 1,2.

Introitus is from the Latin words, 'intro' meaning 'within', and the verb 'ire' meaning 'to go' 2.

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