Background: Threatened abortion constitutes 15–20% of pregnancies and is one of the commonest gynecological emergencies.
Aim of work: The aim of our study is to compare the clinical and sonographic characteristics between women with threatened abortion compared to those with normal pregnancy using transvaginal color Doppler ultrasonography, to predict pregnancy outcome in first trimesteric threatened abortion pregnancies.
Patients and methods: This study a prospective cohort observational, was carried out on 200 pregnant women (divided into two groups). Group I: 100 pregnant women with normal pregnancy. Group II: 100 pregnant women with threatened abortion, in Al-Galaa Maternity Hospital & Al-Hussien University Hospital.
Results: As regards the site, size and growth rate of C.L., there was no significant difference between normal pregnancy and threatened abortion. By T.V.S, 4 different patterns of C.L. could be identified: hypoechoic, thick walled cyst, complex cyst and simple cyst; and none of them was predictive of pregnancy outcome in threatened abortion. As regards resistive index of luteal blood flow, only resistive index increases significantly if abortion occurs; and so far, Doppler studies could serve as a predictive diagnostic tool in assessing C.L. function.
Conclusion: There is significant increase in resistive index of corpus luteum blood flow in cases of threatened abortion which ended as missed, incomplete or complete abortion compared to the continued or control cases.
Keywords: Corpus Luteum, Normal Pregnancy, Threatened Abortion, Transvaginal Color Doppler Sonography