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Recent Status of Pregnancies at an Advanced Maternal Age at a Japanese Perinatal Center.
Curēus 2023 March
Objective We compared the recent obstetric outcomes of women aged 40 and over as advanced maternal age (AMA) to those with AMA more than 10 years ago. Methods This was a retrospective study of primiparous singleton pregnancies who delivered at ≥22 weeks of gestation managed at Japanese Red Cross Katsushika Maternity Hospital between 2003-2007 and 2013-2017. Results The percentage of primiparous women aged with AMA who delivered at ≥22 weeks of gestation increased from 1.5 to 4.8% (p<0.01) due to the increase in the pregnancy conceived by in vitro fertilization (IVF). In the pregnancies with AMA, the percentage of cesarean delivery decreased from 51.7 to 41.0% (p=0.01), while the prevalence of postpartum hemorrhage increased from 7.5 to 14.9% (p=0.01). The latter was associated with an increased rate of in vitro fertilization (IVF) use. Conclusions The percentage of AMA pregnancies significantly increased with the development of assisted reproductive technology, and the prevalence of postpartum hemorrhage also increased in AMA pregnancies.
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