Ultrasound Obstet Gynecol Diciembre 2010

Screening for heart defects in the first trimester of pregnancy: food for thought

Defining the fetal cardiac axis between 11 + 0 and
14 + 6 weeks of gestation: experience with 100 consecutive
pregnancies

First-trimester measurement of the ductus venosus pulsatility
index and the prediction of congenital heart defects