2. Color: usually beige or yellow. White or yellow-green indicates inflammation of reproductive tract or accessory gonad; Microscopically, pink, red and red blood cells are bloody semen, which are common in inflammation of accessory gonads and posterior urethra, and occasionally in tuberculosis or tumors.
3.pH value: The normal pH value of semen is 7.2-7.8. Ejaculatory duct obstruction or urine pollution is less than 72; 7.8 The above is found in seminal vesiculitis or old specimens.
4. Liquefaction time: After normal semen is injected, it becomes gelatinous under the action of seminal vesicle coagulase, and after 15-30 minutes, it becomes liquid under the action of prostatic liquefaction enzyme, which is semen liquefaction. It is abnormal that semen does not liquefy after 30 minutes of injection.
5. Viscosity: The glass rod touches the liquefied semen and gently lifts it to form semen filaments, the length of which is generally less than 2 cm.
6. Sperm count: generally expressed by the number of sperm per milliliter of semen. The normal count is 20 106/ml. Below this value is oligozoospermia, which can be seen in spermatogenic dysfunction caused by various reasons. It will also lead to low fertility or infertility because the chances of sperm entering the uterine cavity and fallopian tube are reduced. If the number of sperm exceeds 250 106 /ml, it means that there are too many sperm, which may also lead to infertility due to the influence of their motility.
7. Sperm morphology: Normal sperm morphology is 50%, otherwise it can lead to infertility.
8. Activity: 50% of the sperm move in a straight line.
9. Survival rate: Generally speaking, it means that 50% of live sperm are detected in after ejaculation 1 hour. The common reasons for the decline of sperm motility and survival rate are paragonimiasis, varicocele, ciliary retardation syndrome caused by chronic respiratory infection, the existence of anti-sperm antibodies in semen or improper preservation of specimens.
10. White blood cells: The number of white blood cells in normal semen is 1 106 /ml. Leukocytosis indicates genital tract or accessory gonad infection.