الفهرس 
MiscarriageOnly 14 pages are availabe for public view
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Abstract
Background: The yolk sac is the first conceptional structure that becomes sonographically visible within the gestational sac. Because the yolk sac is the primary route of exchange between the embryo and the mother, it is essential in early embryonic life. Aim of the Work: To assess accuracy of yolk sac characteristics in predicting pregnancy outcome in pregnant women between 5-13 weeks of gestation. Subjects and Methods: This prospective cohort study was conducted on 170 women at Ain Shams University Maternity Hospital after taking approval from the research and ethics committee of the Faculty of Medicine. The subjects were from women having first-trimester pregnancies and who came to the hospital for routine antenatal follow-up visits between Oct 2016 and Jul 2017 were consecutively recruited for the study. Twenty women who refused to have examinations by transvaginal sonography were excluded. Result: The sensitivity of YS abnormality in predication of abortion was 75%., specificity was 97.7% and accuracy was 94.6%. Conclusion: Current study proved that there were statistical significance increase in frequency of abortion among cases had abnormal yolk sac size, shape and echogenicity. The current study shows that the sensitivity of YS abnormality in predication of abortion was 75%., specificity was 97.7% and accuracy was 94.6%. Recommendations: Detailed information of the YS should be mentioned in the report of TVS in cases of early pregnancy, so that any abnormality can be detected early enough to follow up the patient more frequently and this will decrease the risk of missed miscarriage and allow spontaneous miscarriage because most defective embryos will end in miscarriage normally, which will decrease the cost and effort to treat patients with missed miscarriage.