alexa Risk of complications of pregnancy in women with type 1 diabetes: nationwide prospective study in the Netherlands.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): Evers IM, de Valk HW, Visser GH

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Abstract OBJECTIVE: To investigate maternal, perinatal, and neonatal outcomes of pregnancies in women with type 1 diabetes in the Netherlands. DESIGN: Nationwide prospective cohort study. SETTING: All 118 hospitals in the Netherlands. PARTICIPANTS: 323 women with type 1 diabetes who became pregnant between 1 April 1999 and 1 April 2000. MAIN OUTCOME MEASURES: Maternal, perinatal, and neonatal outcomes of pregnancy. RESULTS: 84\% (n = 271) of the pregnancies were planned. Glycaemic control early in pregnancy was good in most women (HbA(1c) < or = 7.0\% in 75\% (n = 212) of the population), and folic acid supplementation was adequate in 70\% (n = 226). 314 pregnancies that went beyond 24 weeks' gestation resulted in 324 infants. The rates of pre-eclampsia (40; 12.7\%), preterm delivery (101; 32.2\%), caesarean section (139; 44.3\%), maternal mortality (2; 0.6\%), congenital malformations (29; 8.8\%), perinatal mortality (9; 2.8\%), and macrosomia (146; 45.1\%) were considerably higher than in the general population. Neonatal morbidity (one or more complications) was extremely high (260; 80.2\%). The incidence of major congenital malformations was significantly lower in planned pregnancies than in unplanned pregnancies (4.2\% (n = 11) v 12.2\% (n = 6); relative risk 0.34, 95\% confidence interval 0.13 to 0.88). CONCLUSION: Despite a high frequency of planned pregnancies, resulting in overall good glycaemic control (early) in pregnancy and a high rate of adequate use of folic acid, maternal and perinatal complications were still increased in women with type 1 diabetes. Neonatal morbidity, especially hypoglycaemia, was also extremely high. Near optimal maternal glycaemic control (HbA1c < or = 7.0\%) apparently is not good enough.
This article was published in BMJ and referenced in Journal of Diabetes & Metabolism

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