The name for the dizziness and a drop in blood pressure caused when the mother is in a supine position and the weight of the uterus, infant, placenta, and amniotic fluid compress the inferior vena cava, reducing return of blood to the heart and cardiac output, is: (a) supine hypotensive syndrome.(b) premature infant.(c) placenta previa.(d) ectopic pregnancy.

The answer is A: Supine Hypotensive Syndrome.

Explanation:

Uterine growth, the product of a pregnancy in the third trimester, will produce, at the level of the pelvis, pressure on the inferior vena cava. In general, the pregnant woman, while standing for a long time as well, after lying down and trying to get up abruptly, will suffer from dizziness and low blood pressure because there is a decrease in venous return and a drop in cardiac output by the pressure of the uterus engraved on the vena cava.

when you rub, you also apply pressure, that pressure can urge the poop to come out. i think that when your rubbing, you also might be slightly breaking it up and that can further fill the stomach.