Objective: To assess the relationship between the incidence of threatened abortion with serum levels of TPO antibodies. Methods: This was cross-sectional study involving subjects 40 cases and 40 controls. The study was conducted September 2012 to No¬vember 2012. The difference in the levels of thyroid peroxidase an¬tibody was tested by Mann-Whitney test. Result: In this study, hypothyro…