Antibodies to FSH are precoated onto membrane as a capture reagent on the test zone. During the test, specimen is allowed to react with the colloidal gold particles, which have been labeled with antibodies to FSH. If FSH is present, a purple colored line will develop on the membrane in proportion to the amount of FSH present in the specimen. To serve as a procedural control, red colored line in the control zone will always appear regardless of the presence of FSH. FSH is a kind of glycoprotein hormone secreted by the basophil in the anterior pituitary, regulates the development, growth, adolescent sexual maturity of the human body, and a series of physiological processes related to reproduction, in particular to stimulate the maturation of germ cells. The determination of FSH content, can understand the pituitary endocrine function, but also indirectly understand the functional status of the hypothalamus and ovaries. In the clinical, level of FSH significantly and continued to increase is one of the major indicators to determine the emergence of female menopause.