I have diabetes and so far none of my grown children do. My son is 29 then I have a 27, 25, 23 and 21 year old. So far fine. My second granddaughter was born weighing 9lbs 2 oz and her blood sugar was low at birth. The doc's think that probably my daughter's blood sugar was high at the end of her pregnancy and passing sugar on to the baby. When the cord was cut, so was the baby's sugar supply and thus the low blood sugar.
I have checked my grandchildren for diabetes several times....so far so good. We are all watching closely and praying for the best.