This kit is used for quantitative determination of prolactin (PRL) in human serum in vitro. Prolactin (PRL) is a 22000 molecular weight polypeptide secreted by the anterior pituitary. It consists of 198 amino acid residues. Its structure is similar to that of hGH. The secretion of PRL is regulated by prolactin releasing hormone (PRH) and inhibitory factor (PIF) secreted by the hypothalamus. Prolactin can be detected in almost all people's serum, and its content changes in different genders, ages and even in a day. Therefore, it is very important to measure the level of PRL in serum for the diagnosis and treatment of related endocrine function and related diseases. PRL diagnostic kit has a wide range of uses.