Abstract

Background: Pregnancy loss before 20 weeks is considered a miscarriage, as is the loss of a fetus weighing less than 500 grams before viability. A medical emergency, threatened miscarriage affects 15–25% of pregnancies. 
 Aim and objectives: The goal of this study was to assess the predictive value of maternal blood levels of Cancer Antigen 125 (CA-125) and beta-human chorionic gonadotropin (B- HCG) in individuals at risk of miscarriage during the first trimester. 
 Subjects and methods: This study was a prospective cohort study. This study included 120 pregnant women with threatened abortion between (6-11 weeks) and followed up till end of 14th week. Results: 36(30%) of pregnant women aborted, while 84(70%) of women continued till 14th weeks of pregnancy. At a cut-off value of 45 U/ml, the CA125 test was shown to have a sensitivity of 88.9% and a specificity of 77.5%, respectively, while also having a positive predictive value of 79.8% and a negative predictive value of 87.5%. At a cut-off value of 18.501 mlIU/ml, the B-HCG test's sensitivity and specificity were determined to be 96.3 and 88.9, respectively, with a positive predictive value of 89.7% and a negative predictive value of 96%. 
 Conclusion: Even before fetal morphology can be investigated sonographically, abnormalities in the size of the yolk sac can be utilized as a good prognostic sign of early pregnancy loss. Pregnancy viability can be estimated from first trimester serum CA 125 and Beta HCG measurements.

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