Gestational Response, Outcomes, and Weight After GLP-1 Use (GROW)

Glucagon-like peptide-1 receptor agonists (GLP-1RAs) have become widely used for the treatment of obesity because they produce substantial weight loss and improve cardiometabolic health. As use of these medications increases among women of reproductive age, more individuals are conceiving after treatment with GLP-1RAs. Because GLP-1RAs are not recommended during pregnancy, therapy is typically discontinued before conception or immediately after pregnancy is recognized. Although weight regain following GLP-1RA discontinuation has been demonstrated in nonpregnant populations, the effects of discontinuation on gestational weight gain and pregnancy outcomes remain poorly understood.

The GROW study is a prospective observational cohort study designed to evaluate the association between preconception GLP-1RA exposure and maternal and neonatal outcomes. Approximately 400 pregnant women aged 18 to 45 years who are at or before 20 weeks of gestation will be enrolled. Participants will be classified according to whether they used a GLP-1RA within the three years prior to conception. This is an observational study, and no investigational treatment or intervention will be provided.

Participants will complete questionnaires at baseline, during late pregnancy (32-36 weeks gestation), 6-10 weeks postpartum, and 6 months postpartum. Information collected will include demographic characteristics, history of GLP-1RA use, food noise, dietary intake (optional), addictive-like eating behaviors, and infant feeding practices. Maternal and neonatal clinical outcomes will be abstracted from the electronic medical record.

The primary objective is to compare gestational weight gain between women with and without preconception GLP-1RA exposure. Secondary objectives are to compare obstetrical outcomes, food noise, and dietary intake between groups. Findings from this study will improve understanding of the effects of GLP-1RA discontinuation before pregnancy and may help inform counseling and clinical management of women who conceive after treatment with these medications.