Parturient fundal height as a predictor of low birth weight.

The usefulness of parturient fundal height as a predictor of low birth weight (LBW) was studied in 151 singleton pregnancies. The symphysis to fundus (S-F) distance was measured in early labour and was plotted against the birth weight of the newborns. A significant positive correlation was observed between the two parameters (r = +0.740). For the prediction of LBW, the critical limit of the fundal height was 31 cm, meaning that a S-F distance of more than 31 cm is reasonably safe while lesser values predict a higher chance of a LBW infant. From these observations, the use of a colour-coded tape by peripheral health workers and traditional birth attendants is suggested: red for S-F < 28 cm, yellow for S-F = 28-31 cm, and green for S-F > 31 cm. Mothers who have a fundal height in the 'red zone' are at risk of delivering LBW infants.