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近年来,产科实践中争论最多的课题之一为引产问题.为母婴安危而引产的指征是明确的,但当母婴健康并未受到明显威胁时引产则值得考虑.Ballantyno等(1922)首次推荐头盆不称时,于孕足月或刚过足月行引产.Walber(1954)指出孕42周后随着胎儿逐渐成熟,氧气供给减少,胎儿不明原因死亡增加3倍.当时对葡萄糖耐量减低的意义,宫内生长迟缓及其它高危因素尚未认识;又无超声波确诊妊娠时限,监护胎儿方法尚不完善.Bancroft-livingston等(1957)还不能用分光光度计测定脐静脉血氧含量与孕龄之间的关系.
In recent years, one of the most debated topics in obstetric practice has been the induction of labor, and the indications of induction of labor for the safety of mother and child are clear, but it is worth considering the induction of labor when maternal and child health is not significantly threatened.Ballantyno et al. (1922) The first recommendation of the first basin is not known, in full-term or just after full-term pregnancy line.Walber (1954) pointed out that after 42 weeks of gestation as the fetus matures, oxygen supply decreased, unexplained fetal death increased 3 times when glucose The significance of reduced endurance, intrauterine growth retardation and other high-risk factors are not yet known; no ultrasonic diagnosis of pregnancy time limit, fetal monitoring method is not perfect.Bancroft-livingston (1957) can not use spectrophotometer determination of umbilical venous oxygen content and The relationship between gestational age.