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Korean Journal of Obstetrics & Gynecology 2008;51(9):965-973.
Published online September 1, 2008.
A retrospective cohort study of maternal and perinatal risk factors on intrauterine fetal death .
Sang Hae Park, Hyung Min Choi
Department of Obstetrics and Gynecology, Inje University Ilsan Paik Hospital, Goyang, Korea. hhyae97@ilsanpaik.ac.kr
The purpose of this study was to investigate the clinical characteristics and the risk factors of Intrauterine fetal death (IUFD). METHODS: We did retrospective review and investigated the risk factors from medical records of the 62 pregnancies with IUFD between January 2000 and December 2007. Also we statistically analyzed that maternal and perinatal risk factors compared with 3,887 live-birth pregnancies. RESULTS: The overall incidence of IUFD was 1.57%. The age distribution of mother with IUFD was between 21 to 41, and was highest in the 30 to 34 year old age group (41.94%). There were 29 cases (46.78%) with nulliparous and 5 cases (8.06%) with previous IUFD. IUFD was the most prevalent (48.39%) at 20-29 weeks of gestation and the sex ratio of male versus female fetus was 1.03:1. Most of cases (80.64%) were delivered vaginally (spontaneous labor: 62.90%, labor induction: 17.74%), and laparotomy was 19.35%. Risk factors were maternal obesity, infection, placental abnormality, advanced maternal age (> or =35), and unexplained cause in that order. 50 cases included more than two risk factors. The risk analysis showed statistically significant risk in preeclampsia (OR 2.733; 95% CI 1.408-5.306) and placental abruption (OR 5.190; 95% CI 2.165-12.441). CONCLUSION: Identification of risk factors for IUFD assists the clinician in performing a risk assessment for each patient. Clinicians need to be able to assess each patient's risk for IUFD and to have a low threshold to evaluate fetal growth in at-risk pregnancies.
Key Words: Fetal death in utero, Antepartum stillbirth, Risk factors, Perinatal database

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