人绒毛膜促性腺激素(HCG)是由垂体和胎盘分泌的具有刺激性腺活动和维持早期妊娠功能的一种糖蛋白激素。主要用于诊断早孕,病理妊娠,滋养层细胞肿瘤。HCG是由分子量分别为18,000和30,000的α、β两个亚单位组成的一条多肽链。其中α亚单位与LH有相同的分子结构,而β亚单位C末端33个氨基酸是其本身所特有的,因而HCG-β亚单位抗血清是检测HCG的重要手段,应用HCG-β Human chorionic gonadotropin (HCG) is a glycoprotein hormone secreted by the pituitary and placenta that stimulates gonadal activity and maintains early pregnancy. Mainly used for the diagnosis of early pregnancy, pathological pregnancy, trophoblastic tumor. HCG is a polypeptide chain composed of two subunits α, β with molecular weights of 18,000 and 30,000 respectively. The α subunit has the same molecular structure as LH and the 33 amino acids at the C terminus of β subunit are peculiar to itself. Therefore, HCG-β subunit antiserum is an important measure to detect HCG. HCG-β