Early Pregnancy Ultrasound Measurements and Prediction of First Trimester Pregnancy Loss.

Ultrasound examination of gestational sac (GS) diameter, yolk sac (YS) diameter, crown rump length (CRL) diameter, embryonal heart rate (HR) using Samsung Medison SonoAce R3 through transvaginal probes (6.5 MHz) was conducted on 126 pregnant women. At least 2 scans were done for each participant one between 6-8 weeks and another one by the end of first trimester. Results then were compared to get the cut off values that can predict pregnancy loss.