Male sperm motility standards

Basic semen analysis can mainly grasp information such as sperm density, sperm count, and the total number of sperm in the semen, sperm agglutination, sperm motility and sperm motility rate, sperm morphology, and sperm liquefaction. In fact, the analysis of these contents is only a very superficial analysis, and sometimes it is not possible to truly understand the role and fertilization potential of male sperm. Especially in terms of artificial insemination and in vitro fertilization, it is not possible to decide whether artificial insemination can be carried out based only on the information provided by semen inspection.

Evaluation index

(1) Sperm density: normal ≥ 2ml. When it exceeds 7ml, it is too much. Not only the number of sperm is reduced, but also easy to be discharged from the vagina, so that the number of male sperm is reduced, which is more common in seminal vesiculitis; when it is less than 2ml, it is too low, but generally 1m l The following are too few. At this time, the contact area between semen and the female reproductive system is small, or the density is not good for sperm to enter the female cervix, resulting in infertility. This is more common in severe secondary sex hormone inflammation, low testosterone levels, vas deferens obstruction, reverse ejaculation, etc.

(2) Color: Normally it is gray or a little yellow. White or light green indicates inflammation of the reproductive system or sex hormones; pink, red, and blood cells seen under the microscope are stubborn spermatozoa, which are more common in inflammation of the sex hormones and posterior urethra, and can occasionally be seen in tuberculosis or tumors.

(3) pH: The normal pH value of sperm is 7.2~7.8. Lower than 72 is usually caused by vas deferens obstruction or urine pollution. ； A value exceeding 7.8 is often caused by inflammation of the seminal vesicles or old specimen collection. (4) Vaporization time: After normal semen is ejaculated, it becomes jelly-like under the action of coagulation and hydrolysis of the seminal vesicles, and turns into liquid under the action of vaporization and hydrolysis of the male prostate in 15 to 30 minutes. This is sperm liquefaction. If the semen still does not vaporize 30 minutes after ejaculation, it is an abnormality.

(5) Thickness: Touch the vaporized semen with a glass rod and lift it gently to produce semen silk. When normal, its length is less than 2cm.

(6) Sperm count: Generally expressed as the number of sperm in 1ml of semen. The normal count is ≥ 20 periodontal 106/ml. Less than this value means that men have too few sperms, which is common in spermatogenic function problems caused by 7 various reasons. It can be The reduced chance of male sperm entering the uterus and bilateral fallopian tubes can lead to subfertility or infertility. If the male sperm count exceeds 250 periodontal period and 106/ml, it means that the male has too many sperms. The sperm motility is affected and can also cause infertility.

(7) Sperm morphology: ≥50% of male sperm are of normal shape, otherwise it may lead to infertility.

(8) Sperm motility: ≥50% of male sperm move forward rapidly in a straight line.

(9) White blood cell count: The white blood cell count in normal semen is <1 periodontal 106/ml. More white blood cells indicates infection in the reproductive system or accessory sex hormones.

(10) Survival rate: Generally refers to the detection of viable male sperm within 1 hour of ejaculation, ≥50%. Common causes of reduced male sperm motility and survival rate include inflammation of secondary sex hormones, sperm varicose veins, microvilli unsalable syndrome caused by chronic respiratory infections, sperm antibodies in semen, or poor specimen collection and storage.