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1974年4月20日至11月8日某大学妇科医院无选择地检查594次分娩的胎盘及其脐带。作者检查脐带全长、胶质量、直径、脐动脉旋转的方向及强度、脐带及其附着处的解剖特点、脐带缠绕及脐带血管数目;新生儿Apgar评分、脐动静脉血的pH值、Clifford氏规律、羊水颜色、胎儿身长、体重及胎盘的成熟情况、最大及最小直径、最大及最小厚度、附着面及病理变化。并询间妊娠期限、过去妊娠次数、有无糖尿病、妊娠中毒症及RH因子不合、胎位、分娩方式及分娩时胎心率变化。作者观察分娩时婴儿情况与脐带胶质量及脐动
From April 20, 1974 to November 8, 1974, a university gynecological hospital had no choice but to check 594 deliveries of the placenta and its umbilical cord. The authors examined the total length of the umbilical cord, the mass and diameter of the umbilical cord, the direction and intensity of rotation of the umbilical artery, the anatomical features of the umbilical cord and its attachment, the number of umbilical cord entrapments and the number of umbilical cord blood vessels; neonatal Apgar scores; pH of umbilical arteriovenous blood; Clifford’s Law, amniotic fluid color, fetal length, body weight and placental maturity, maximum and minimum diameter, maximum and minimum thickness, adhesion surface and pathological changes. And asked about the pregnancy period, the number of past pregnancies, with or without diabetes, gestosis and RH factors, fetal position, mode of delivery and changes in fetal heart rate during childbirth. The authors observed infants during childbirth and umbilical cord quality and umbilical cord