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FIGURE 1.. Adjusted absolute risks for pregnancy outcomes according to prepregnancy BMI and gestational weight gain (GWG) categories. According to the World Health Organization, the categories are defined as follows: for BMI—small-for-gestational age (SGA): <10%; large-for-gestational-age (LGA): >90%; emergency cesarean section (CS) and postpartum weight retention (PPWR) of 5 kg; for GWG—low, <10 kg; medium, 10–15 kg; high, 16-19 kg; and very high, 20 kg. Points present the risks for a primiparous woman, aged 25–29 y, height 1.60–1.69, nonsmoker, no alcohol consumption, high social status, no exercise, and 280 d of gestation. For PPWR, she is breastfeeding for <14 wk. Of 58 342 (SGA and LGA), 58 693 (PPWR), and 54 810 (emergency CS) women, 4% were underweight (BMI < 18.5), 69% were normal-weight (BMI 18.5–24.9), 19% were overweight (BMI 25–29.9), and 7% were obese (BMI 30).
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