Transvaginal chorionic villus sampling using transabdominal ultrasound guidance: A new technique for first-trimester prenatal diagnosis Article
Shulman, LP, Simpson, JL, Elias, S et al. (1993). Transvaginal chorionic villus sampling using transabdominal ultrasound guidance: A new technique for first-trimester prenatal diagnosis
. 8(2), 144-148. 10.1159/000263763