1. Your sperm count is consistently below 15 million/ml. 2.You have been infertile for more than one year and may have other problems despite a normal sperm count. 3.You feel abnormal pain in the testicles, a feeling of swelling, a lump or a mass of veins on the surface. 4.Ejaculation is difficult. 5. Application of androgens or other drugs. 6. There are sexually transmitted diseases or other reproductive tract infections that have not been cured. 7.No ejaculation of semen during ejaculation.