Definitions:
NPDC: Seperate items for measured and self-reported weight - Maternal weight in kilograms and Self-reported maternal weight in kilograms.
S/T Perinatal Data Collections: VIC: Mother's self reported weight (body mass) in kilograms around the time of conception. QLD: Measured in kilograms, self reported weight of the mother in the four to six weeks prior to or at conception. WA: The weight in kilograms at time of booking for birth of the woman giving birth. If the woman has no weight recorded before 20 weeks gestation, report the self-reported weight at conception. SA (from 1/1/12): no definitions specified. QLD PMC: Earliest measured in pregnancy. VIC PMC: Mother’s self-reported weight (body mass) about the time of conception. Used to calculate Body Mass Index (BMI).