Assessment of fetal thymus size and BMI in pregnant women with diabetes.

The Mann-Whitney U test was used for comparison of two groups, i.e. diabetic pregnancies and non-diabetic pregnancies, whereas Kruskal-Wallis H test was used to compare multiple groups. A linear regression model was used to determine the correlation between the type of diabetes and fetal thymus size as well as between maternal BMI and fetal thymus size. The significance level α was set at 0.05. Thymus size is statistically smaller in foetuses of diabetic mothers when compared to healthy controls. Overweighted and obese pregnancy is not a factor affecting fetal thymus size.