인제의대부속 서울 백병원 산부인과에서 1980년 1월 1일부터 1985년 12월 31일까지 만 6년간 총분만수 9,613례 중 쌍태임신 96례에 대한 임상 통계적 고찰을 통해 다음과 같은 결론을 얻었다 1 쌍태 분만의 단태 분만에 대한 비율은 1:101 1)이었다 2 연령 분포는 최소 연령 18세, 최고연령 40세이며, 평균연령은 27세이고 쌍태 중 초산부가 44 7%이었다 3 임신 기간은 37주 이상이 69 7%이었고 평균 임신주수는 37 0주이었다 4 태위는 두위-두위가 46 8%, 두위-둔위가 39 5%로 대부분을 차지하였다 5 분만 지속시간은 평균 7 3시간이었고, 제 1아 만출로부터 제 2아 만출까지의 소요시간은 5분이내가 73 9%이었다 6 분만방법으로는 제 1아는 자연분만 48 9% 흡인분만 18 7%, 그리고 제 2아는 자연분만 3 5%, 둔위만출술 27 0%이었다 수술 적응증으로는 기왕 제왕절개분만이 8례, 임신중독증, 태위이상이 각각 5례이었다 7 신생아의 체중은 평균 2,400gm으로 제 1아는 2,2420gm, 제 2아는 2,370gm이었다 8 태반은 10 4%에서 용수박리했고, 반수이상의 태반은 단일융모막 및 이중양막이었다 9 성별로는 양측 여성이 46 8%, 양측 남성이 37 5%, 혼성이 15 6%이었다 10 합병증으로는 빈혈 47 4%, 임신중독증 21 6%로 가장 많고 산후출혈이 21 6%이었다 11 주산기 사망은 21례로 그 사망률 은 10 9%이며 원인은 조산아가 57 1%로 제일 많고, 모체 사망은 없었다

Twin pregnancies are interesting because of the greater risk to the mother and babies than the singleton pregnancies In the present study, we examined the 96 twin pregnancies among 9613 women, who delivered in the six year period from January, 1980 to December, 1985 1 Number of twin pregnancies were 96 cases among 9613 deliveries(1:101 1) 2 In the age distribution, the youngest was eighteen year old woman and the oldest was forty year old woman in twin deliveries, and average age was twenty seven yearsold Primipara was occupied 44 7% 3 Delivery after the 37th week of gestation occurred in 69 7% and average birth weight was 2400gm 4 In presentation, the cephalic-cephalic combination was 46 8% and the cephalicbreech combination was 39 5% 5 The average duration of labor was 7 3 hours and an incidence of 73 9% of cases was within 5 minutes in time iterval between 1st and 2nd baby delivery 6 The mode of delivery in twin pregnancy, the 1st baby was 48 9% in spontaneous delivery and 18 7% in vaccum extraction, and the 2nd baby was 37 5% in spontaneous delivery and 27 0% in breech extraction 21 cases of Cesarean sections, which was encountered in 21 8%, its main indications were such as previous Cesarean section, preeclampsia and malpresentation 7 In 10 4% of cases, the manual removal of the placenta was performed and the diamnionic-monochorionic was most common(61 4%) 8 Both female was 46 8%, both male 37 5%, and opposite sex was 15 6% in infant sex 9 The maternal complications during pregnancy were anemia(47 4%), toxemia(21 6%), and in labor and postpartum state anemia(62 6%), postpartum hemorrhage(21 6%) 10 There were 21 perinatal death, it revealing 10 9% of perinatal mortality rate of twin an maternal death was not encoumtered in this case