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Objective
There is some evidence that birth defects are related to maternal age, gender, and residence, but in-depth studies need to be included. To define the relationships between gender, residence, maternal age, and a broad range of birth defects, we examined surveillance data from the Birth Defects Surveillance System in Hunan Province.
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Background: In recent years a trend towards childbearing at older maternal age is evident. Most of the current literature investigated the association between advanced maternal age and neonatal outcome at term. We aimed to study the outcomes of the mother and the neonate among preterm births of women of advanced maternal age. Methods: This retrospe...