In the context of human evolution, human vestigiality involves those traits (such as organs or behaviors) occurring in humans that have lost all or most of their original function through evolution.
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In mammals, the vagina is the elastic, muscular part of the female genital tract extending, in humans, from the vulva to the cervix.The outer vaginal opening is normally partly covered by a membrane called the hymen.
2) Hymenectomy – This is the surgical procedure used to open a hymen that is imperforate, Microperforate or Septate.Usually an anatomically correct hymen can be stretched and broken during first intercourse or tampon use without too much trauma.
This is a perfect annular hymen. It is called annular because the hymen forms a ring around the vaginal opening. As the hymen starts to erode from sexual or other activity, the hymen becomes less ring-like.
female reproductive apparatus; internal female genital organs / organa genitalia feminina interna : the various organs in the female that are concerned with reproduction
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This poses a problem because obviously, menstruation is a normal physiologic function in women and no one can stop it. Not even this imperforate hymen.
Retained Periods. Retained menses is not a common phenomenon. It may be due to the menses being retained with the uterus or even in the vagina. An imperforate hymen is where the hymen fully rather than partially covers the vagina and at the onset of menstruation during (menarche), the menses cannot pass out of the vagina.
2) Hymenectomy – This is the surgical procedure used to open a hymen that is imperforate, Microperforate or Septate.Usually an anatomically correct hymen can be stretched and broken during first intercourse or tampon use without too much trauma.