Abstract
Maternal immunity is important for the implantation phase, and exaggerated inflammatory responses may reduce the chance of implantation and pregnancy. Transforming growth factor β1 (TGF-β1) plays a role in the modulation of cellular growth, maturation and differentiation, extracellular matrix formation, immunoregulation, and apoptosis. In this study, we aimed to evaluate the changes in serum TGF-β1 and C-reactive protein (CRP) levels in infertile women following intrauterine insemination (IUI) according to the presence of pregnancy. Sixty-three infertile patients were selected for the study in a nine-month period. Clomiphene citrate or recombinant gonadotropins were used for ovulation induction, and all patients underwent IUI following human chorionic gonadotropin (hCG) trigger. The pregnant and non-pregnant groups' TGF-β1 and CRP levels were measured. The CRP levels increased significantly from the day of the hCG trigger to the 8th day after hCG trigger in the non-pregnant group (P = 0.003) whereas TGF-β1 levels decreased in the pregnant group (P = 0.001). Maternal inflammatory responses play an important role in the occurrence of pregnancy. Changes in the levels of TGF-β1 and CRP may have a role in the outcome of IUI. Serial measurements of TGF-β1 and C-reactive protein, if confirmed by larger studies, may become valuable in predicting the outcome of IUI.
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