Prediction of pregnancy complications by first‐trimester maternal serum PAPP‐A and free β‐hCG and with second‐trimester uterine artery Doppler

Abstract Background Previous studies have shown an association between low first trimester maternal serum free β‐hCG and PAPP‐A and subsequent development of pregnancy complications. Similarly, uterine artery Doppler in the late second trimester has shown that high impedance to flow is associated wi... View More