Parental type 1 diabetes can affect children's cognitive dev
Glucose crosses the placenta and maternal high blood sugar, hyperglycemia, can affect fetal development including the baby's brain. There is little evidence on different diabetes subtypes and the effect of having a father with type 1 diabetes.

Researchers included 622,073 children between 6-18 years old attending public schools over a seven-year period. There were 2,144 children with mothers with type 1 diabetes, 3,474 children with fathers with type 1 diabetes, and 616,455 children from the background population. Children of mothers and fathers with type 1 diabetes had mean scores of 54.2 and 54.4 respectively, compared with mean scores of 56.4 in children from the background population.

The team acknowledge that having a parent suffering from a serious chronic disease like diabetes could cause stress and be detrimental to a child's school performance. However this study suggests a different explanation for previously observed adverse effects of maternal type 1 diabetes during pregnancy on children's cognitive development.

Source: https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1003977
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