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Korean Journal of Obstetrics & Gynecology 2006;49(10):2066-2074.
Published online October 1, 2006.
Pregnancy outcomes in women aged 35 and older.
Hee Jin Park, Sook Hwan Lee, Dong Hyun Cha, In Hyun Kim, Hye Sun Jun, Kyoung Jin Lee, Song Ah Song, Hey Ri Park, Chang Jo Chung, Chung No Lee
Department of Obstetrics and Gynecology, College of Medicine, Pochon CHA University, Seoul, Korea. dnalee@nuri.net
Abstract
OBJECTIVE
To estimate the effect of maternal age on obstetric outcomes, a retrospective analysis was done. METHODS: Twenty six hundred and forty six women who delivered a singleton baby at our hospital from January 1, to December 31, 2004 were enrolled in this study. Subjects were divided into 3 age groups; 1) less than 35 years, 2) 35-39 years, and 3) 40 years and older. Chi-square test was used to assess the effect of age on obstetrics outcome. Then the odds ratio was calculated to represent clinically meaningful risk. RESULTS: A total of 2646 women with complete data were available; 2245 (84.9%) less than 35 years of age; 350 (13.2%) 35-39 years; and 51 (1.9%) 40 years and older. Increasing age was significantly associated with chromosomal abnormalities (OR 3.9and 8.8 for ages 35-39 years and age 40 years and older, respectively), Preterm premature rupture of membranes (OR 1.3 and 3.2) and cesarean delivery (OR 2.0 and 5.5). Patients aged 35-39 years were at increased risk for placenta previa (OR 1.8) and congenital anomaly (OR 2.8) but these were not statistically significant. The rate of the preterm delivery was increased by age (OR 1.3 and 1.9 for ages 35-39 years and age 40 years and older, respectively) but it was not statistically significant (p=0.121). We did not find advanced maternal age to be associated with a statistically increased risk for preeclampsia, congenital anomaly, gestational diabetes, placenta abruption, low birth weight, macrosomia, neonatal morbidity (NICU admission), and perinatal loss. CONCLUSION: In conclusion, although the likelihood of adverse outcomes increases with maternal age, patients and obstetric care providers can be reassured that overall maternal and fetal outcomes are favorable in this patient population.
Key Words: Advanced maternal age, Obstetric outcomes


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