미숙분만에 관한 임상통계학적 관찰 = Clinical Analysis of the Preterm Birth

다국어 초록 (Multilingual Abstract)

The preterm birth has recently become one of the most important issues in obstetrics The development of neonatology has made a great contribution to the treatment of preterm baby and decrease of neonatal mortality rate In order to investigate the various risk factors of preterm birth and contribute to prevention of preterm birth hereafter, we performed statistical analysis on 6434 cases of preterm birth delivered at Department of Obstetrics and Gynecology, Catholic Medical College from 1975 to 1984 The results were obtained as follows 1 The rate of preterm birth to total birth by maternal age was 11 1% in maternal age of under 20years and 9 9% in maternal age of over 35 years, and these were significantly higher than 6 2% in maternal age of 21-34years 2 Number of preterm birth was increased as number of delivery was increased, and preterm birth rate was increased from 6 1% in nullipara to 23 7% in multipara over 5 deliveries 3 Number of preterm birth was increased as number of abortion was increased, and preterm birth rate was increased from 5 5% in the group experienced no abortion to 20 7% in the group experienced abortion over 4 times 4 Most of newborn babies with under 28 weeks of gestational age and under 1500gm of body weight were expired and neonatal mortality is closely related to gestational age 5 As compared with total births, preterm birth was shown 33 times more in cases with previous preterm birth and 2 times more in cases with previous FDIU and previous uterine operation Therefore preterm birth is closely related to previous obstetrical history, but not related to previous cesarean section 6 Other obstetrical risk factors like chorioamnionitis, placenta previa, abruptio placenta and multiple pregnancy were also related to preterm birth 7 Neonatal mortality rate was decreased more significantly in urban area when compared with that in rural area