The volume of one ejaculation is usually 3-5 ml. If you do not ejaculate for a long time, the volume of semen will be slightly elevated and can reach 6 ml. If ejaculation is frequent, it can reach about 1 ml. The vast majority of male semen is made up of prostate fluid, containing a certain amount of seminal vesicle fluid and sperm, of which prostate fluid is mainly secreted by the prostate gland, but the amount of prostate fluid secreted per unit of time is limited, so the semen volume can also fluctuate significantly. In some cases, the amount of semen differs from the normal population. In azoospermic men, there is also fluid emitted, but the fluid is dominated by prostatic fluid or seminal vesicle fluid, and there is no sperm. In contrast, people with retrograde ejaculation have sexual pleasure, but no semen is ejected. The semen is ejected retrogradely with the urethra into the inside of the bladder. It is recommended that every man do a premarital examination before getting married or before preparing to have a child. You can do semen routine and sperm viability examination to determine both your own semen volume and your own sperm viability rate, which will help in eugenics and fertility.