《论衡·卷三·奇怪篇》
那首诗说 胞衣破裂，胎盘分离 ，是说后稷出生没有损伤他母亲的身体。
《被诗》言 不坼不副 者，言後稽之生，不感动母身也。
That poem says "the amniotic sac ruptured, and the placenta detached", meaning that Hou Ji was born without injuring his mother's body.