FSH has the functions of regulating menstrual cycle, ovulation and male 
testicular function in human beings. It is commonly used in clinical treatment 
of female infertility, insufficient secretion of male gonadotropins, and defects 
of seminiferous tubules. In the human pituitary gland and in the urine of 
menopausal and postmenopausal women, the content of both is higher, so it is 
also the main source of FSH extraction. 

      The raw material for the production of 
u-FSH, Human Menopausal Gonadotropin (HMG), mainly contains follicle-stimulating 
hormone and luteotropic hormone (Luteotropic Hormone, LH). The ratio of FSH to 
LH titers is approximately 1:1. The preparation of high-purity 
urofollicle-stimulating hormone requires the removal of LH and other urinary 
proteins from HMG, and the retention of high-purity single active component of 
FSH.
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