Fig. 1

Optimal gestational weight gain for Chinese pregnant women. The predicted probability that did not exceed a 2.5% increase from the lowest aggregated risk of adverse pregnancy outcomes (preeclampsia, preterm delivery, small for gestational age, large for gestational age, and/or macrosomia) was 0.45–0.48 for underweight women, 0.45–0.48 for normal weight women, and 0.44–0.46 for overweight/obese women, which corresponded to 8.2–13.0 kg, 7.3–12.5 kg, and 2.0–9.4 kg of total gestational weight gain, respectively