A monkey infant enters the birth canal headfirst, with the broad back of its skull against the roomy back of the mother 's pelvis and tailbone.
猴儿进入产道时，头下脚上，较宽的后脑勺顶著母猴骨盆背面和尾椎的宽敞空间。
A monkey infant enters the birth canal headfirst, with the broad back of its skull against the roomy back of the mother 's pelvis and tailbone.
猴儿进入产道时，头下脚上，较宽的后脑勺顶著母猴骨盆背面和尾椎的宽敞空间。
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