The World Health Organization has set the normal value of male semen.
Normal value of semen routine examination items
The semen volume is greater than 2 ml.
PH 7.2-8.0
The sperm density is above 20 million/ml.
More than 30% of the normal form
More than half of them have level 3 vitality.
Liquefaction time is less than 30 minutes.
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.