有正常性生活、未经避孕1年未妊娠者称为不孕症,不孕症发生率因国家、民族和地区不同存在差异,我国不孕症发病率为7%～10%〔1〕。对于不孕症的发生原因国内、国外都有诸多报道,例如女方输卵管的原因和男性精液的原因。对于男性精液而言,密度<20×106/ml为少精,A级活力精子与B级活力精子之和≥50%为正常活力。影响精液密度和活力的 Have a normal life, without pregnancy 1 year of non-pregnancy known as infertility, the incidence of infertility due to differences in countries, ethnic groups and different regions, the incidence of infertility in China is 7% to 10% 〔1〕. For infertility causes at home and abroad have a lot of coverage, such as the reasons for female tubal and male semen reasons. For male semen, the density of <20 × 106 / ml for the less refined, Class A and sperm motility and sperm motility ≥ 50% of normal activity. Affect semen density and vitality