The Biomarkers Core Laboratory at the Yerkes National Primate Research Center (YNPRC) provides investigators with critical hormone assay services and the specialized expertise necessary to obtain high-quality data from basic, preclinical, and translational research studies. Primary core services include the analysis of non-human primate, rodent, and human samples for steroid and peptide hormones and other small molecules relevant to neuroendocrinology, psychoneuroimmunology (stress physiology and inflammation), reproductive biology, and cardiometabolic health. The Yerkes BMC also develops, validates, and optimizes new assays upon request by internal and external investigators.