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Neonatal morbidities in gestational diabetes mellitus
1Department of Women and Child Health Division of Pediatrics, St Göran's Hospital, Karolinska Institute, Stockholm, Sweden. bengt.persson@swipnet.se
Diabetes Care
|August 15, 1998
Summary
Gestational diabetes mellitus (GDM) can lead to complications like fetal macrosomia and increased cesarean sections. Further research is needed to define GDM subtypes and standardize impact assessment for better maternal and infant outcomes.
Area of Science:
- Obstetrics and Gynecology
- Endocrinology
- Perinatal Medicine
Background:
- The broad definition of gestational diabetes mellitus (GDM) complicates understanding its impact on fetal and neonatal outcomes.
- Confounding variables such as maternal age, obesity, ethnicity, and diagnostic criteria hinder comparative analyses of GDM morbidity.
- Emerging evidence suggests GDM may be linked to increased fetal malformations and perinatal mortality, particularly in undiagnosed pre-existing diabetes cases.
Purpose of the Study:
- To evaluate the association between gestational diabetes mellitus (GDM) and adverse fetal and neonatal outcomes.
- To compare morbidity rates in GDM pregnancies with the general population, accounting for confounding factors.
- To highlight the need for refined definitions and standardized assessment criteria for GDM and its impact.
Main Methods:
- Analysis of a nationwide Swedish study (1991-1993) involving 3,322 treated GDM pregnancies.
- Comparison of perinatal mortality, preeclampsia, emergency cesarean section, fetal macrosomia, asphyxia, and Erb's palsy rates in GDM versus background populations.
- Examination of infant outcomes based on birth weight categories.
Main Results:
- No increase in perinatal mortality was observed in treated GDM pregnancies.
- Rates of preeclampsia (doubled) and emergency cesarean sections (1.6 times higher) were elevated in GDM pregnancies.
- Fetal macrosomia (>4,500g), asphyxia, and transient tachypnea were 2-3 times more frequent; Erb's palsy risk increased with macrosomia.
Conclusions:
- Gestational diabetes mellitus (GDM) is associated with significant maternal and neonatal morbidity, including increased rates of preeclampsia, cesarean delivery, and fetal macrosomia.
- The adverse outcomes appear concentrated in specific GDM patient subsets, necessitating clearer diagnostic criteria.
- Standardization of GDM assessment and impact evaluation is crucial for improving perinatal care and outcomes.