Used to measure levels of leukemia inhibitory factor (LIF) in human biological samples such as serum, plasma, or cell culture supernatants. This kit is widely applied in research settings to study conditions involving inflammation, immune responses, and reproductive biology, as LIF plays a key role in embryo implantation and stem cell regulation. It is also used in cancer research to investigate the role of LIF in tumor progression and the tumor microenvironment. The assay provides a sensitive and specific way to quantify LIF protein, supporting both clinical research and drug development studies.