妊娠第28周至分娩为妊娠的晚期阶段。孕晚期,母体基础代谢率增至最高峰,一些与孕育有关的器官、组织代谢加快,胎儿生长速度也达到最高峰,同时,体内营养素储存速度也加快,这就要求孕晚期 The 28th week of gestation until delivery is the later stage of gestation. Third trimester of pregnancy, maternal basal metabolic rate increased to the highest peak, some of the organs associated with pregnancy, tissue metabolism accelerated, fetal growth rate reached its peak, at the same time, in vivo nutrient storage speed also accelerated, which requires late pregnancy