The nurse is explaining the physiology of uterine contractions to a group of nursing students. Which statement best explains the maternal-fetal exchange of oxygen and waste products during a contraction?
A) Little to no affect
B) Increases as blood pressure decreases
C) Diminishes as the spiral arteries are compressed
D) Continues except when placental functions are reduced

Question

Quizplus · Accepted Answer

During labor contractions, the maternal blood supply to the placenta gradually stops as the spiral arteries supplying the intervillous space are compressed by the contracting uterine muscle. The exchange of oxygen and waste products is affected by contractions. The exchange of oxygen and waste products decreases. The maternal blood supply to the placenta gradually stops with contractions.

The Nurse Is Explaining the Physiology of Uterine Contractions to a Group