In order to care for obstetric patients adequately, the nurse understands that labor contractions facilitate cervical dilation by:
a. Contracting the lower uterine segment.
b. Enlarging the internal size of the uterus.
c. Promoting blood flow to the cervix.
d. Pulling the cervix over the fetus and amniotic sac.
ANS: D
Effective uterine contractions pull the cervix upward at the same time that the fetus and amniotic sac are pushed downward. The contractions are stronger at the fundus. The internal size becomes smaller with the contractions; this helps to push the fetus down. Blood flow decreases to the uterus during a contraction.
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