Big babies in diabetes

Big babies in diabetes

Some women with diabetes who become pregnant or women who have been diagnosed with gestational diabetes become worried when they read of  women with diabetes delivering huge babies.  In a large Scandinavian study of over 10,000 women with GDM only 8% had babies over 4.5 kg  (nearly 10 lbs) and we know treatment will lessen this chance.   In another large study of  babies of women with Type 1 diabetes the average birth weight was 205 g (7 oz) heavier than the general population.  There is a problem but not as big as some expect; so why does diabetes cause big babies?   Sometimes in a simplistic manner it is stated that the high sugar goes into the baby and is converted into fat.  It is more complex (see below) but what is important to remember is that diabetes is only one of many contributors to the size of the baby, an important one, and one that we can do something about but it is not the only thing to determine the size of the baby.

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