Introduction:

many pregnant women attended in prenatal genetic consultation come from families with diabetes mellitus and develop gestational diabetes, so they require preconception genetic counseling on risk factors, which they do not receive in many cases.

Objective:

to identify family antecedents of diabetes mellitus in pregnant women who debut with gestational diabetes, without having received preconceptional genetic counseling.

Materials and methods:

a retrospective descriptive study was carried out during the period 2017 to 2019 in 186 pregnant women from the municipality of Matanzas, diagnosed with gestational diabetes.

Results:

39.7 % of the pregnant with gestational diabetes came from families with diabetes mellitus; 27.02 % of them had an affected first-grade relative; maternal hereditary transmission predominated in 59.45 %; 22.58 % presented congenital defects, and 54.05 % did not received preconceptional genetic counseling.

Conclusions:

not all the pregnant women with family antecedents of diabetes mellitus received preconceptional genetic counseling, which is essential to minimize the risk of gestational diabetes.

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