For the treatment of:A. The diagnosis and treatment of puberty cryptorchidism. B. Male infertility induced by pituitary dysfunction. It can be combined with HMG. Long-term gonadotropin dysfunction should be supplemented with testosterone. C. Female anovulatory infertility induced by pituitary gonadotropin deficiency. It is often treated after clomiphene treatment is ineffective. The combined use with menotropin and post-menopausal