In the Wosera area of Papua New Guinea, the nutritional status of 899
women of child-bearing age (measured by weight, body mass index, and s
kinfolds thickness) showed a strong negative correlation with parity,
independent of age, This maternal depletion occurred despite a mean bi
rth interval of three years. Average maternal weight gain during pregn
ancy was about 5 kg, thus the estimated weight gain from fat depositio
n, blood and extracellular volume expansion was only 650 g, Evidence o
f increasing fertility in recent years highlights the need for effecti
ve family planning to limit the impact on women of child bearing age.