Yolk sac diameter as a predictor of pregnancy outcome

Yolk sac was identified from 34 days of gestation by transvaginal sonography and was identified from 42 days of gestation by transabdominal sonography. 117 first trimester singleton pregnancies were studied by Stampone C, Nicotra M, Muttinelli C, Cosmi EV 2 to evaluate yolk sac size and abnormalities using transvaginal ultrasound. ................
................