ROLE OF USG FINDINGS AS A PREDICTIVE MARKER IN THREATENED ABORTION

Background: The Centers for disease control and prevention, and the World Health Organization all define abortion as pregnancy termination before 20 week gestation or with fetus born weighing <500g [1].  Early pregnancy USG parameters: - fetal crown-rump length (CRL), the presence/absence of sub-chorionic hematoma and Fetal Heart Rate (FHR) are good predictors of outcome. Material and Methods: The study was conducted in the Department of Obstetrics and Gynaecology, S.P. Medical College Bikaner& associated Group of Hospital, Bikaner, Rajasthan. This is a hospital based prospective comparative study. The study group comprise of pregnant females attending Obstetrics and Gynaecology OPD. A total of 200 pregnant women are examined in this study. We divided these patients into 2 groups i.e group A and group B. Group A consists of 100 pregnant females with threatened abortion and group B with 100 normal pregnant female. Results: FHR at 115bpm is 76.32% sensitive, 90.32% specific in predicting abortion with 82.86%  positive predictive value and  86.15% negative predictive value.  While CRL at 11 mm is 50% sensitive, 69.35% specific in predicting abortion with 55% positive predictive value and 69.35% negative predictive value.   Conclusion: FHR is best predictive marker followed by presence or absence of sub-chorionic hematoma and CRL  in threatened abortion which results in loss of pregnancy. Keywords: Pregnancy, Abortion, Threatened, USG