![]() After the shoulder, the rest of the body is usually delivered without a problem.The obstetrical dilemma is a hypothesis to explain why humans often require assistance from other humans during childbirth to avoid complications, whereas most non-human primates give birth unassisted with relatively little difficulty.After the head is delivered, the top shoulder is delivered under the pubic bone.As the baby's head is delivered, it will rotate a quarter turn to be in line with the body. ![]() It rotates under and around the pubic bone.
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