The freshly discharged semen is usually slightly cloudy and grayish white, and becomes translucent egg-white and milky after liquefying on its own. What tests should be done? The standard of normal semen: 1. Semen volume: the volume of semen emitted by one ejaculation, negatively related to the frequency of ejaculation. The normal volume should be more than or equal to 1.5 to 2 ml (milliliters). If more than 8 ml of semen is ejaculated at one time, it is too much. If the total amount is less than 1.5 (more than 5-7 days of abstinence), the amount of semen is low. Both too much and too little semen can easily lead to infertility. 2. Color: Normal semen is grayish white or slightly yellowish in color, translucent milky white after liquefaction, and slightly light yellow for those who have not ejaculated for a long time. If the semen appears yellow-green, it indicates that there may be inflammation in the male reproductive tract or paraphilic glands (such as prostatitis and vesiculitis). If the semen is red (including bright red, light red, dark red or soy sauce color), it should be highly suspected that the semen contains blood (hematosperm), and those who contain a large number of red blood cells after testing can be diagnosed as hematosperm, commonly seen in patients with inflammation of the secondary gonads and posterior urethra, and occasionally seen in patients with tuberculosis or tumors. 3, smell: the smell of semen is produced by the prostate fluid, normal fishy odor. When the prostate secretion function is impaired, semen will lack this fishy odor. 4. Liquefaction time: semen is in a gel state when it is first discharged from the body, and it will turn into a liquid state after a period of time, a process called liquefaction. What’s wrong with the long-term yellowing of semen? 1, abstinence for too long: If men have not had sex for a long time, the concentration of semen will be higher, and then semen will naturally have a temporary yellowing phenomenon. 2, eat stimulating food: acid, pungent, spicy and fried and other stimulating food, easy to cause sperm yellowing. It is advisable to eat more light and vitamin C-rich vegetables and fruits. 3, reproductive infection disease: men with prostatitis, vesiculitis, will also cause the phenomenon of sperm yellowing. The inflammation of the prostate gland and seminal vesicles, the bacteria will stimulate the semen in the semen, thus reducing the quality of the semen, which will also cause the sperm yellowing. Does yellow sperm affect fertility? Yellow sperm may affect fertility. If the yellowing of sperm is caused by not having sex for a long time, it is a physiological factor that lasts for a short period of time and will disappear soon and will not affect fertility. However, if the yellowing of sperm is due to pathological reasons, such as prostatitis, vesiculitis and other diseases, it will affect the physiological function and have an impact on fertility, which may lead to infertility in serious cases and needs to be treated in a hospital. The examination of yellow semen: 1, semen color and viscosity: normal semen is gray-white jelly, usually 10 minutes later often liquefied into a transparent liquid, if the first discharge of semen after too long without ejaculation, is light yellow, is also normal. 2. pH: normal fresh semen is slightly alkaline, with a pH value between 7.2 and 8.9, averaging 7.8. Acidic sperm activity and metabolic rate are reduced, while alkaline is enhanced, and too alkaline is counterproductive. If fresh semen is left for a long time, it will acidify on its own, which will affect sperm vitality. So check the semen, must be fresh semen, generally should not exceed 1 hour. 3. Semen liquefaction time: semen is in a gel state when it is first discharged from the body, and will turn into a liquid state after 5-30 minutes, a process called liquefaction. The liquefaction of semen requires the participation of a series of proteolytic enzymes. Sticky and non-liquefied semen is commonly found in patients with prostate or seminal vesicle diseases. Semen is weakly alkaline, with a pH value between 7.2 and 7.8. If pH <7, it is acidic, and if pH >8, it is alkaline, both of which will restrict sperm function. 4. Semen volume: The volume of semen excreted on the 6th day after no semen has been excreted for 5 days reaches 3-5 ml, usually not less than 1.5 ml, which are considered as normal semen excretion; on the contrary, it can be considered as semen reduction. Yellow semen daily diet: 1, yellow semen can usually eat more calcium-rich foods, like milk, sweet almonds, wakame, shiitake mushrooms, mustard, soy products, kelp, enoki mushrooms can be. 2, sperm activity and the number of fructose contained in the seminal vesicles related, low fructose content in semen, it is easy to cause dead sperm disease. Fructose-rich fruits are apples, grapes, pineapples, sweet oranges and so on. The river shrimp, beef, wolfberry and leek are all recommended by traditional Chinese medicine for generations as aphrodisiacs. 3, usually pay more attention to rest, do not smoke and drink to eat a variety of spicy food, to adjust the number of sexual life, do not overindulge, masturbation habits must be changed.