Precautions for semen tests 1, accurate semen analysis test is an important means of evaluating male fertility, male sperm have normal fluctuations, all patients should make 2~3 times semen analysis is more accurate. 2, semen should be abstained from sex for 2~7 days before the semen test, too long or too short abstinence time will affect the accuracy of semen analysis. 3, in order to accurately compare different semen samples from the same patient, the time of abstinence before semen collection must be consistent, and differences in the time of abstinence can affect the results of semen tests. 4.Samples of semen should preferably be collected in the hospital by masturbation and sent for testing within one hour. 5.Ordinary latex condoms generally contain spermicide, which can affect sperm vitality, so you can’t use ordinary condoms to collect semen for examination. 6, sexual intercourse interruption method semen collection is not the most ideal method. Because this method will cause the loss of the initial semen and the contamination of vaginal bacteria and acidic secretions. 7, semen collection in the hospital as far as possible, such as home collection should be placed in a pocket close to the body to maintain a temperature of 20oC or more not more than 40oC, as soon as possible to the hospital for examination. 8, the first examiner should generally do two semen analysis, the interval between two semen collection should be greater than 7 days, but not more than 3 weeks. If there is a significant difference between the results of the two times, a third analysis should be performed. 9, semen collection must be complete, that is to say, all of the semen, incomplete semen should not be examined. Incomplete semen should not be examined, as the result of not being allowed to cut will cause the doctor to diagnose and treat incorrectly. 10, if you want to do microbiological examination, the patient should first urinate and wash his hands and penis, with a sterile container collection.