Expectant mothers have bigger appetites on average if they are carrying a boy rather than a girl, suggests a study of pregnant US women.



The eating habits of 244 pregnant women attending a Boston hospital revealed that those who gave birth to baby boys had a 10 per cent higher daily calorie intake than those who bore girls. Boys tend to be about 100 grams heavier than girls at birth, but no study has really explained why, says the team of international researchers.



The latest findings may add to the understanding of human evolution, believes Dimitrios Trichopoulos, an epidemiologist at Harvard University and the study leader.
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