The preterm delivery has recently become one of the most important issues in obstetrics. The premature labor should be used for uterine contraction persisted over 30 seconds every 10 minutes accompanied by cervical changes from gestational age 20
weeks
to 37 weeks. Preterm labor resulting in preterm birth is one of the most important single cause of perinatal death and neonatal morbidity as well as subsequent impairments. Therefore, premature labor is both an extremly important public health
and
clinical problem. The development of neonatology has made a great contribution to the treatment of premature baby and decrease of neonatal mortality rate. On obstetrician's opinion, it is desirable to understand of etiology of preterm birth.
In order to investigate the various risk factors of premature labor and contributed to prevention of premature labor, we performed statistical analysis on 727 cases of preterm birth delivered at Department of Obstetrics and Gynecology, National
Medical
Center from 1980 to 1989.
@ES The results were obtained as follows:
@EN 1. The rate of preterm births to total births was 72.
2. When maternal age at first delivery is 20 or less, this group is shown to have the highest risk of preterm delivery, Mothers who are between 20 and 29 years of age when they start childbearing have the lowest risk of preterm delivery. For
mothers
having their second and third births, the risk of preterm birth increases significantly for mothers aged less than 20 years, but decreases for mothers aged over than 20 years.
3. As compared with total births, preterm birth was shown 4.6 times more in cases with previous pretorm birth and 4.0 times more in case with previous perinatal mortality, 1.7 times more in cases with previous uterine operation, but less
associated
with
previous FDIU and previous cesarean section.
4. The risk of preterm birth associated with obstetric risk factors was increased multiple pregnancy, eclampsia, placenta previa, preeclampsia, congenital anomalies, PROM, hydramnios, abnormal lie, abruptio placentae, chorioamnionitis in order.
5. The risk of preterm birth associated with maternal diseases was increased liver disease, myomas, acute pyelonephritis, genital anomalies, chronic hypertension, urinary tract infection, thyrotoxicosis, heart disease, hepatitis in order, but not
related to pulmonary tuberculosis and abnormal CTT.
6. The risk of preterm birth was increased in low antenatal care.
7. There is a marked association between the proportion of unmarried mothers and the occurrence of preterm birth.
8. The neonatal mortality is closely related to gestational age and most babies of under 29n gestational weeks were expired.
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