According to the standards for normal semen set by the World Health Organization (WHO), determining whether semen is normal can be analyzed from the following aspects. Have you paid attention to the volume of your semen each time you ejaculate? The normal one is between 2ml and 7ml. When zoologists study animal phenomena, they believe that the frequency of mating is related to the size of the penis and the amount of semen, which is not necessarily the case. Is it bad to have more semen? No. When there is too much, not only is the semen diluted, resulting in lower sperm density, but it also tends to flow out of the vagina, resulting in a lower total number of sperm, which is not conducive to conception. When you have vesiculitis, you will have too much semen. Of course, it is more troublesome if the semen volume is less than 2ml, especially if it is less than 1ml. Too little semen is commonly associated with severe paraphimosis, low testosterone levels, ejaculatory duct obstruction, and retrograde ejaculation. If the semen is too little, the contact area with the female reproductive tract is small, or because it is too viscous, it is difficult for the sperm to swim and enter the cervical opening of the female, so it cannot unite with the egg, thus leading to infertility. The color of semen is normally off-white or slightly yellow, and this is something that men have observed in their own semen. Some books describe it as milky white, not normal, if it is milky white, or yellow-green, it means that there is inflammation in the reproductive tract or the secondary gonads. Pink and red are even worse. This is called bloody semen, which is commonly associated with inflammation of the secondary gonads and posterior urethra, and considered more serious, seen as tuberculosis or tumors. You may want to observe your own ejaculated semen, for example in a condom: at the beginning the semen is jelly-like, slowly, it takes about 15 to 45 minutes for the semen to change to liquid and become thin and transparent under the action of prostate liquefying enzyme, don’t be afraid, this is a normal phenomenon, called semen liquefaction. If your semen is always jelly-like, meaning that it is still not liquefied 45 minutes after ejaculation, it is also a disease because it is not conducive to sperm swimming, which is a common cause of infertility in men. Other conditions concerning semen will require laboratory tests by a doctor to help identify. Simply put, semen pH: normal pH 7 to 8; viscosity: touch the glass rod to the already liquefied semen and gently lift and hold it, semen filaments can be formed, and its length is less than 2cm when normal; sperm density: greater than 20 million/ml; total sperm: greater than 40 million/ml; activity rate: greater than 60%; activity: grade 3, most of which are in straight line motion; sperm morphology: normal form Spermatozoa: greater than 50%; white blood cells: less than 10 per high magnification field of view of the microscope. Sometimes, for some reason, we go to a male examination and the doctor, after taking a medical history, examination and laboratory tests, will come up with a different diagnosis and say that our semen is abnormal, which of course is in conflict with the above normal indicators. Semen abnormalities can be divided into two categories: semen abnormalities and sperm abnormalities. The former refers to the amount of semen, abnormal color and quality, while the latter refers to the amount of sperm, abnormal quality and malformation.