Just as women need gynecology, men cannot do without male science. Male science (Andrology) is an ancient and young discipline, the name of this discipline comes from the Greek andros and scientific logy two words together, meaning the study of male medicine, male science is the main study of male reproductive health and prevention of diseases of the reproductive system science. The scope of male medicine is divided into anatomical parts: prostate, urethra, penis, scrotum, testes, epididymis, spermatic cord, seminal vesicles; by disease: 1, male genital organs congenital anomalies: such as cryptorchidism, small penis, cryptorchid, hypospadias, syringomyelia, etc.; 2, male infertility: such as spermatogenic disorders, vas deferens obstruction, idiopathic infertility, varicocele, etc.; 3, sexual function and sexual 3, sexual function and psychological disorders: such as erectile dysfunction, abnormal penile erection, penile sclerosis, non-ejaculation, ejaculation pain, etc.; 4, prostate diseases: such as prostatitis, prostate hyperplasia, prostate cancer, etc.; 5, male birth control and contraception and eugenics; 6, male reproductive system tumors: such as penile cancer, testicular tumors, etc. 7, male reproductive system infections: such as testicular, epididymitis, vesiculitis, vasovaginitis, urethritis, etc. 8, male reproductive system trauma: such as testicular torsion, urethral rupture, ** dislocation, fracture, etc.; 9, male aging and androgen supplementation: such as male menopause syndrome; 10, human sperm cryopreservation and assisted reproductive technology, etc.; 11, sexually transmitted diseases (STDs); 12, other diseases related to the male reproductive system. In a word, all diseases related to the male reproductive organs are the scope of male treatment.