In order to determine a man's fertility, doctors often ask him to have a semen test. Normal semen color is grayish white or milky white. If abstinence lasts for a long time, it may be light yellow. If it is bright red and dark red, it means that the patient has inflammation or genital tract injury. The amount of semen discharged each time is 2~6 ml, which is often affected by the number and frequency of semen discharge. Fresh semen is viscous and jelly-like, and should be liquefied into a dilute liquid within 1 hour. Insert a small glass rod into semen and lift it. The length of the formed semen filaments is generally less than 2 cm, otherwise it is regarded as abnormal. Semen is weakly alkaline, and its PH value is 7.2~7.8. The normal sperm count should exceed 20 million/ml. Active sperm within 1 hour after sperm discharge >: =50%. The World Health Organization suggests that sperm motility can be divided into four levels: level 0: inactive; Grade 1: Sperm wobbles in situ; Grade 2: moderate forward movement; Level 3: active forward movement, fast linear movement. Sperm with normal sperm activity rate of grade 2-3 >: =40%~50%. Sperm morphology: abnormal sperm is less than 50%. The analysis of male fertility can not be based on a certain index of semen, but should be based on the comprehensive ability analysis of sperm quantity, vitality, activity rate and liquefaction time abnormality rate.
Sperm quantity: 2 ~ 6 ml each time. More than 8 ml is called oligozoospermia, and less than 1.5 ml is oligozoospermia. 2 Semen pH: 7.2 ~ 8.6, with an average of 7.8. 3 Semen liquefaction: completely liquefied in 30 minutes. Those who do not liquefy over 1 hour are called semen liquefaction disorder. Number of sperm in semen: 60-200 million per milliliter. Less than 20 million per milliliter is called oligozoospermia. 5. Sperm vitality: Sperm moving forward should be quantified, not less than 60% in the first hour and not less than 50% in the second hour. 6 sperm survival rate: dead sperm does not exceed 50%. Sperm morphology: not less than 70% of normal sperm. If the semen test results are significantly different from the above values, you should suspect that you are infertile. Of course, we can't just draw a conclusion based on a certain indicator. Comprehensive analysis and re-examination within 2 ~ 3 weeks can make a diagnosis.