Delayed pregnancy is high risk pregnancy in which Apgar score of infants is low and rate of operative delivery is high although the weight of infants increased.

• 延期妊娠虽新生儿的体重较足月组略有增高 ,但其新生儿Apgar评分渐减 ; 手术产率显著增高 ,存在难产因素 ,故应视其为高危妊娠