Abstract

ntroduction: Recurrent abortion is defined as three or more spontaneous miscarriages before first trimester of pregnancy. Protein C, S, Antithrombin III deficiency is of the min factors of this disease. The presence of antiphospholipid antibodies, such as Lupus Anticoagulant, antiphospholipid, anticardiolipineand and B2 glycoprotein can lead to recurrent abortion. This study was performed with aim to determine the serum level of these factors in women with recurrent abortion. Methods: This cross-sectional study was performed in 2017 on 80 women with recurrent abortion who had abortion at first trimester of pregnancyand had referred to gynecology clinic. Clotting method was used to determine theprevalence of deficiency of natural anticoagulant proteins.ELIZA method was used to determine the presence of antibodies ofantiphospholipidsyndrome. Data were analyzed by SPSS software (version 22) and t-test. PResults: Activated Protein C-Resistance was found in 21.3 of cases, prevalence of PS deficiency and PC deficiency individually with 8.8, component PSD and PCD in 3.7 and AT-III deficiency in 1.3 of patients. Presence of LAC in our patients was 3.8. The prevalence of APA, LAC, ACA and B2 microglobulin were 2.5, 3.8, 1.3 and 2.5 respectively. Conclusion: APC-R was the most common deficiency of natural coagulant inhibitors in women with recurrent abortion who referred to clinical laboratory of Bagheatalah general hospital in Tehran. © Mashhad University of Medical Sciences. All rights reserved.