The Bariatric sUrgery and Maternal nutrition in Pregnancy (BUMP) Study

Bariatric (weight loss) surgery like gastric bypass or sleeve gastrectomy can change how the body absorbs vitamins and nutrients — and pregnancy after bariatric surgery brings unique nutritional challenges. Poor nutrition during pregnancy can affect both the mother's health and the baby's development, but there is limited Australian data on how well these pregnancies are managed. The BUMP Study is collecting information on pregnancy weight changes, dietary intake, vitamin deficiencies, and health outcomes in women who become pregnant after bariatric surgery. This is an observational study — no new treatment is being tested. Researchers simply want to understand what is happening nutritionally so that care guidelines can be improved. You may be eligible if you are pregnant (up to 22 weeks gestation), have had bariatric surgery previously, are expecting to give birth at one of the participating hospitals, and are comfortable communicating in English. Twin or triplet pregnancies and women with conditions affecting nutrient absorption other than bariatric surgery are not eligible.