All issues > Volume 19(5); 1976

Original Article

J Korean Pediatr Soc. 1976;19(5):351-359. Published online May 31, 1976.

The Clinical and Statistical Study of Post-Term Infant

Young Jin Chung¹

¹Department of Pediatrics,Yonsei University College of Medicine,Seoul,Korea

Abstract

Prolonged pregnancy has been the subject of numerous studies about the question of damage to the fetus by placental insufficiency. It is obvious that such degeneration can occur, as every obstetrician, pediatrician and pathologist knows from personal experience. Yet there is a wide divergence of opinion regarding the significance o£ the risk of prolonged pregnancy and the need to avoid it by terminating the pregnancy. This divergence is partly due to variations in the selection and evaluation of patients, but also is partly inherent in the ill-defined nature of the condition. The present study concerns the perinatal mortality of post-term and placental dysfunction in Severance Hospital, Jonju Presbyterian Hospital and Wonju Christian Hospital births which, are associated with maternal obstetric conditions from Jan. 1970 to Dec. 1972. The perinatal mortality rate was calculated at fetal deaths plus neonatal deaths (deaths under 28 days after birth) of 42 or more weeks’ gestation. The results of clinical analysis for 1736 post-term infants were summarized as followings 1)Incidence of post-term infant was 15. 3% and the perinatal mortality was 26. 5%o. 2) Sex ratio of post-term infant was not statistically significant, but in neonatal mortality rate male came to somewhat higher (70%) than female (30%). 3. In post-term infant the rates of low birth weight and high birth weight were 2. 2% and. 7. 3% respectively. By comparing term infant, these rates were not statistically significant. 4)The perinatal mortality rate was increased with maternal age over 35. The perinatal mortality rates were also higher in primipara, toxemia and multipara especially delivered more than 5 times. 5)The frequency of obstetric complications were toxemia, spontaneous previous rupture of membrane, amnionitis and placenta previa etc. in order. And the complications related with, perinatal mortality were toxemia, spontaneous previous rupture of membrane, abruptio placentae etc. in order of freauency. 6)Incidence of placental dysfunction syndrome in post-term infant was 10. 7% and the perinatal mortality was high increased in stage II of placental dysfunction syndrome compare with stage I and III.

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