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Uterine artery Doppler at 11 + 0 to 13 + 6 weeks in the prediction of pre-eclampsia.
Plasencia W, Maiz N, Bonino S, Kaihura C, Nicolaides KH.
Ultrasound Obstet Gynecol 2007;30:742-9. -
Prediction of pregnancy complications by first-trimester maternal serum PAPP-A and free beta-hCG and with second-trimester uterine artery Doppler.
Spencer K, Yu CK, Cowans NJ, Otigbah C, Nicolaides KH.
Prenat Diagn 2005;25:949-53.