GLP1R and hydrops fetalis: This meta-analysis estimates absolute risk reduction (ARR) and number needed to treat (NNT) for GLP-1 receptor agonists to prevent one HF event in patients with type 2 diabetes and/or obesity, including those without baseline HF.<h4>Methods</h4>The Medline, Embase, and Cochrane Central databases were searched to 04 April 2025 for placebo-controlled randomized controlled trials (RCTs) of GLP-1 receptor agonists in a type 2 diabetes and/or obesity indication with a prespecified HF event endpoint.