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Screening for adverse pregnancy outcome by ductus venosus Doppler at 11-13+6 weeks of gestation.
Maiz N, Valencia C, Emmanuel EE, Staboulidou I, Nicolaides KH.
Obstet Gynecol 2008;112:598-605. -
Second-trimester uterine artery Doppler screening in unselected populations: a review.
Papageorghiou AT, Yu CK, Cicero S, Bower S, Nicolaides KH.
J Matern Fetal Neonatal Med 2002;12:78-88.