Routine semen tests mainly include appearance, semen volume, liquefaction time, viscosity, acidity and alkalinity. 1. Appearance: Under normal circumstances, freshly ejaculated semen is milky white, off-white or light yellow, if there is no sex for a long period of time or the interval between two ejaculations is too long, the color of semen may become yellow, which is normal. 2. Semen volume: the total amount of semen in one ejaculation, representing the secretion function of the gonads, the normal range is 1.5 to 6 ml, less than 1.5 ml or more than 8.0 ml is considered abnormal. 3. Liquefaction time: under normal circumstances, freshly ejaculated semen is in the form of jelly, which transforms into liquid form within 5 to 30 minutes. If the semen does not liquefy for more than 1 hour, it suggests that the sperm cannot move freely. 4. Viscosity: A mucus filament less than 2 centimeters in length is normal. 5. pH: Normal semen pH is 7.2 to 7.8, which is weakly alkaline. If the pH is greater than 7.8, it is often considered to be caused by inflammation of the seminal vesicle glands or prostate gland. Before having a routine semen test, you should abstain from sexual intercourse for two to seven days, and abstain from smoking and alcohol for one week. If the results of the initial test are normal, there is no need to test again. If the results of the first semen test are abnormal, the test should be performed again. To summarize, if there is any discomfort, you should seek medical attention.