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选择完成系列产前检查并有分娩记录的 6 35例正常孕妇为观察对象 ,记录其 2 8孕周时的胎位为初诊胎位 ,此后分别于孕 32周、36周检查记录胎位 ,并与分娩前胎位对照。结果显示 ,整个晚期妊娠中胎位都在不停地变化 ,到妊娠 36周以后 ,多数转为头位。提示在第 2 8孕周时即应注意对异常胎位的纠正 ,横位可能是臀位转为头位的过程 ,并且较臀位更易于转变为头位 ;初产妇的胎位在第 32孕周后多已固定 ,而经产妇的胎位固定多在第 36孕周以后。初产妇胎位纠正应力争在 32孕周以前完成 ;而经产妇在 36孕周发现异常胎位时也应积极纠正 ,以促其向头位转变。
A total of 635 normal pregnant women who chose to complete a series of prenatal examinations and had childbirth records were observed. The 28-week-old fetuses were recorded as first-born fetuses and were examined at 32 and 36 weeks of pregnancy respectively. Fetal position control. The results show that the entire late pregnancy fetal position are constantly changing, to 36 weeks after pregnancy, the majority turned to head position. Tip in the 28th gestational week that should pay attention to the correction of abnormal fetal position, the transverse position may be the process of breech to head position, and more likely to change than the breech of the head position; primiparous fetal position in the first 32 gestational weeks After more than fixed, and maternal fetal position more than the first 36 weeks after gestational age. Correction of primipara bit should be completed before 32 gestational weeks; while the fetus in 36 weeks of pregnancy should be actively corrected abnormal fetal position to promote its change to the head position.