Abstract:In a group of 810 singleton pregnancies without malformations or chromosomal abnormalities blood flow velocity wave forms of the umbilical artery were recorded in the third trimester by means of a pulsed duplex Doppler system. We calculated the pulsatility index (PI). 133 newborn with a birthweight below the 10th centile were classified as small-for-gestational-age (SGA) (prevalence: 16%). The sensitivity of the test (elevated PI) for these neonates is 52% and the specificity 97%, the positive predictive value… Show more
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