Duration: 2-7 days of abstinence, the same duration of abstinence, with some correlation to the usual frequency of sexual life. Completeness of the specimen: has a definite influence on the semen test results, which needs to be marked during the examination for the doctor’s reference. Semen collection at home: Pre-weighed, name marked non-toxic container; delivered to the laboratory 30-60 minutes after semen collection; maintained at 20-37°C during transportation. Use condoms for collection Non-toxic condoms specifically designed for semen collection; Interrupted intercourse is not a reliable method of semen collection