Used in medical research and diagnostics as a labeled compound to study steroid metabolism and hormone-related disorders. It serves as a tracer in mass spectrometry and other analytical techniques to accurately measure and monitor endogenous hormone levels. Applied in clinical studies to investigate conditions like congenital adrenal hyperplasia, where progesterone metabolism is disrupted. Also utilized in pharmaceutical development to assess the efficacy and safety of hormone-based therapies. Its isotopic labeling ensures precise tracking in metabolic pathways, aiding in the understanding of steroid biosynthesis and regulation.