Patient: We have already had a semen test and it indicated a low viability. We would like to have another semen test, when is the right time and can we have it together with prostate fluid? When is the next semen test more appropriate? Reply: The semen analysis should be done three times, and the time between two tests should be more than 1 week and less than 3 weeks. Semen and prostate fluid cannot be tested at the same time.