In the course of clinical outpatient treatment, patients appear to have lower values of semen analysis after a period of treatment than before treatment? On the one hand, it is necessary to reconsider whether the treatment plan is correct, on the other hand, the semen examination results are affected by many factors. We are now collating the factors that constitute an impact on semen analysis and examination as well as many habits that affect sperm quality. I. Common factors The issue of days of abstinence: Our doctors recommend 2-7 days, preferably 3-5 days of abstinence after a more accurate semen examination. If this period is exceeded, the semen analysis results are prone to abnormalities. Poor rest recently or the night before semen collection. Poor sleep due to recent business trips or train rides the night before semen collection. Excessive alcohol consumption recently or the night before semen analysis. Recent cold. Recent sedentary lifestyle and exposure to radiation. Recent depression or irritability. Whether the sample was not collected completely or whether there was any spillage. Second, affect the quality of sperm lifestyle Drinking history: alcohol can affect the quality of semen; smoking history: nicotine on male reproductive health; sedentary people: engaged in IT industry: sedentary, radiation semen quality decline; often drive: sedentary scrotum testicles forced, affecting semen; like to play games: radiation, stay up late will affect the quality of semen vitality; like sauna: scrotum afraid of high temperature, causing less sperm dead sperm; long-term stay up late. Staying up late hurts semen drainage. Therefore, semen examination generally requires two to three or more examinations, the results are more accurate and have great reference significance. Do not worry excessively about the poor results of one semen analysis, and most patients will get better with general treatment.