Associations among gestational weight gain, physical activity, and pre-pregnancy body size with varying estimates of pre-pregnancy weight.

Objectives: the purpose of this study was to examine associations among gestational weight gain (GWG) and pregnancy leisure-time physical activity (LTPA), within pre-pregnancy body mass index (BMI) categories, while utilising two different estimates of pre-pregnancy weight.

Design: a cohort study. Data were collected via questionnaire and abstraction from birth certificate as a part of a larger study.