Fourth Descent — Fetal Malnutrition* … Another development that came with bipedalism is that in the late stages of gestation, the prenate would be so large that it would press against the blood vessels in the surrounding environment and inhibit the blood flow to the extent that nutrients and oxygen were not supplied sufficiently. A big part of that reduction of blood flow came out of the fact that standing up magnified that constriction of blood vessels. By contrast, the fetuses of our four-legged primate cousins hang loosely below the mother, not impeding the blood flow.
Because of this reduction in the supply of nutrients to the fetus, the arc of growth, at the end of gestation, flattens out and does not catch up and begin retracing the curve established earlier in gestation until after birth. The prenate’s growth, measured by its weight, as well as body length, slows significantly beginning in the third trimester and especially during the last four weeks of gestation and resumes its spurt only when it is no longer in the womb. By comparison, our ape relatives, not to mention other planetmates, do not have that prenatal arrest of development.
Thus, we were beginning to have *fetal malnutrition*, because of our upright gait, which was another source of hellacious pain for us as neonates having vast consequences for human psychology. We stood up, and our soon-to-be-born children got really crowded in the womb. They were suffocating and starving in there, too.
More at…
http://sillymickel.blogspot.com/2018/03/the-descents-of-man-descents-to.html
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