问题
单项选择题
Assessment of a client in active labor reveals meconium-stained amniotic fluid and fetal heart sounds in the upper right quadrant. Which of the following is the most likely cause of this situation
A. Breech position.
B. Late decelerations.
C. Entrance into the second stage of labor.
D. Multiple gestation.
答案
参考答案：A
解析：Fetal heart sounds in the upper right quadrant and meconium-stained amniotic fluid indicate a breech presentation. The staining is usually caused by the squeezing actions of the uterus on a fetus in the breech position, although late decelerations, entrance into the second stage of labor, and multiple gestation may contribute to meconium-stained amniotic fluid.