| A clinical study on twin. |
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Ho Joon Im, Sang Yoon Ahn, In Joon Seol, Soo Jee Moon, Hahng Lee |
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Department of Pediatrics, College of Medicine, Hanyang University, Seoul, Korea |
| 쌍생아에 관한 임상적 고찰 |
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임호준, 안상윤, 설인준, 문수지, 이항 |
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한양대학교 의과대학 소아과학교실 |
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Received: 10 November 1990 • Accepted: 26 February 1991 |
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| Abstract |
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Among the total of 17,991 newborns delivered at Hanyang University Howpital from January 1980
to December 1989, a clinical study was performed on 277 twin pregnancies.
The results of the study were as follows:
1) The incidence of twins was 1:64.9.
2) The average male-female sex ratio of twins was 1:1.1, total same sex pairs rate was 79.4%
(male-male & female-female) and different sex rate was 20.6%.
3) The incidence of relation with maternal parity was highest at first pregnancy.
4) 54% of distribution of birth weight was below 2,500gm.
5) Birth weight related to gestational age:
a. first twins showed peak level at 40 weeks of gestation as 2,694±410 gm
b. second twins showed peak leval at 41 weeks of gestation as 2,694±407gm
6) In comparison of birth weight between co-twins, first-born twin was heavier than second-bom
twin at 54.5% and there was about one-half a situation less than 10% difference in body weight
between co-twins, second-bom twin was heavier than first born twin at 44.4%.
7) At 1 minute, over 8 apgar score were present in 81.2% of first twins and were present in 77.6%
of secod twins.
8) Perinatal mortlaity was 99.3/1,000.
9) Causes of perinatal death were immaturity, respiratory distress syndrome, complication of
pregnancy and labor, congenital anomalies and infection. |
| Key Words:
Twins, Multiple birth |
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