Vagina. after 1 min. in vagina, semen becomes viscous (due to coagulants present in prostatic and seminal fluid)after 20 min. semen liquifiescontractions of vaginal wall (due to orgasm) facilitate transport of sperm. Cervix. less than 1 million sperm make their way through the cervixcanal is lined with folds, cervical fibers, thick mucusafter ovulation, mucus becomes less viscous; cervix widens slightlysperm enter single file at rate of 1.2-3 mm / minute.
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