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Required Data
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Method of Measurement and Acquisition
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Ideal
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Practical
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Prepreganancy weight
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Measureda at a preconceptional visit
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Recalled at the first prenatal visit using a standardized question
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Prepreganancy height
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Measureda at the first prenatal visit
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Gestational weight gain
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Total gain: last measured available weight abstracted from clinical records
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Total gain: maternal recall of last available weight
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Pattern of gain: requires trimester-specific or midpregnancy weight abstractions
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Gestational age at last available weightb
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Abstracted from clinical records
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Postpartum weight
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Total retention: measured maternal weight abstracted from clinical records
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Total retention: recalled maternal postpartum weight
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Measured longitudinally in nonpregnant women
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Cross-sectionally in nonpregnant women
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Time: serial measurements 3, 6, 9, 12, and 18 months after delivery
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Time: 3, 6, 9, 12, or 18 months after delivery
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aAll weight and height measurements should be performed in light clothing without shoes.
bThe gestational age at delivery may vary substantially from the gestational age at the last prenatal visit. Thus, misclassification may result if the gestational age at delivery is used in combination with weight at the last prenatal visit to determine weight gain adequacy.
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