Pregnancy outcomes in women with diabetes mellitus - the impact of diabetes type and treatment

Introduction: It has been estimated that approximately 16% of pregnancies worldwide are affected by pre-existing or gestational insulin-dependent (type 1) or independent (type 2) diabetes mellitus (DM). Diabetes mellitus in pregnancy remains a high-risk condition for both mother and child. This study aimed to investigate pregnancy outcomes regarding DM types. Material and methods: The study included 323 DM patients delivered for 6 years (2012-2017). General and obstetric history data and all complications throughout the pregnancy and the early neonatal period were noted. Based on DM type, women were divided into 4 groups: pre-pregnancy/pre-existing DM, insulin-dependent or independent, and gestational diabetes mellitus with or without insulin therapy. Results: The majority of women had pre-existing insulin-independent DM (type II 62%). Some types of pregnancy/maternal complications were registered in almost 85% of examined pregnancies. However, all babies were live born and mostly with good outcome (36.85% with early neonatal complications). Diabetes mellitus type could not predict the occurrence of neonatal complications (p = 0.342). Pre-existing insulin-dependent DM increased the risk for pregnancy complications (p = 0.031; OR = 1.656). Conclusions: Diabetes mellitus type has a limited impact on pregnancy outcomes and the occurrence of maternal and neonatal complications. With adequate therapy the pregnancy outcome can be good regardless of DM type.