Hemodynamic changes during labor in pregnant women with heart disease, which one is wrong
选项：

A:First stage uterine contractions increase peripheral circulatory resistance and reduce systemic blood volume;
B:Breath-holding during second stage contractions increases pulmonary circulation pressure;
C:During the second stage of labor, abdominal pressure increases, visceral blood rushes to the heart, and the amount of blood returned to the heart increases;
D:After the fetus is delivered during the third stage of labor, the uteroplacental circulation stops, a large amount of blood enters the body circulation, and the amount of blood returned to the heart increases;
E:The uterus shrinks rapidly in the third stage of labor, the abdominal pressure decreases, a large amount of blood returns to the internal organs, and the blood returning to the heart decreases