What problems do men need to pay attention to before the sperm check, many men do preconception or premarital examination, one of the very important items is semen examination, before doing semen examination need to pay attention to the following aspects: first, avoid smoking, alcohol, spicy, it is best to be able to light diet; second, before the examination to abstain from sex for 3-5 days, the semen specimen is more reliable; third, when taking sperm, you need to use the way of masturbation to take sperm, after obtaining semen is best to be able to send to the laboratory within 15 minutes, and save the sperm temperature between 20-35 ℃.