The cervix, a part of a woman's reproductive system, is a passage that connects the uterus to the vagina. It is the lower, narrow part of the uterus, which allows the menstrual blood to flow out into the vagina during menstruation. During pregnancy the cervix is tightly closed to keep the foetus inside the uterus until birth. Another important function of the cervix is during child birth, when the cervix dilates or widens to allow the passage of the foetus from the uterus to the vagina. Globally, the incidence of...
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