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1. Dilation. Begins with the contraction of uterine muscle Dilation of cervical canal and rupture of amniotic sac (amniotic fluid/water rushes out of the vagina). Cervix fully dilated.
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1. Dilation • Begins with the contraction of uterine muscle • Dilation of cervical canal and rupture of amniotic sac (amniotic fluid/water rushes out of the vagina). • Cervix fully dilated.