Association between gestational weight gain and adverse pregnancy outcomes: cohort analysis from South Asia and Sub-Saharan Africa.

As the GWG Z-score increased, the risk of preterm birth had a clear decreasing trend among underweight participants and a modest decreasing trend among normal BMI participants and less clear trends for overweight and obese participants (with the exception of an increasing trend among the obese in AMANHI-Pakistan that is likely to be due to very low sample size).

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