Can fundal height predict birth weight or twins?

To determine how well symphysis fundal height measurements correlated with birth weight, the authors retrospectively reviewed 100 records of pregnancy from a family practice. The sensitivity and specificity of symphysis fundal height in identifying small and large for gestational age babies were determined. While symphysis fundal height measurements correlated well with birth weight, the sensitivity was too low and the number of false positives too high, for symphysis fundal height measurement alone to be clinically useful. On reviewing all twin pregnancies in the same setting, the authors found that symphysis fundal height measurements facilitated early diagnosis of twin gestation.