We performed 1698 examinations of anticardiolipin antibodies (ACLA) among pregnant women with gestational age from 16 to 37 weeks of pregnancy during eleven months of 1996. The ACLA levels above normal range were found in patients with pregnancy induced hypertension, preeclampsia, gestational diabetes, diabetes mellitus type I, venous thrombosis, thrombocytope- nia and rheumatological diseases. The following results show the possible relations between high ACLA levels and pregnancy indu- ced hypertension and gestational diabetes. The screening test for ACLA is recommended as a supportive method for prenatal follow-up of pregnant patients. This work was supported by the Grant Agency of the Ministry of Health of the Czech Republic - grant No. 3320-3.

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