Some men who suspect that their fertility is not normal or plan to do eugenic tests before pregnancy, etc., go to male clinics or reproductive centers to ask for a checkup, and when the doctor asks him to do a semen test, he feels embarrassed and often asks the doctor to change to another method, but in fact there is no other way, and a semen analysis must be done. The reason is that although the physical examination can provide a preliminary understanding of the male reproductive capacity, for those patients with normal development of the testes, epididymis, vas deferens and penis, the only way to understand the condition of the sperms and semen is also through semen analysis. Through semen analysis, the quality of sperm can be initially determined, such as the number of sperm, sperm motility and sperm morphology, etc.; the state of semen can be understood, whether it is in a non-coagulation state, or at room temperature for 1 hour is still not completely liquefied, etc. (Under normal circumstances, semen just out of the body semen is in the state of watery, i.e., the state of liquefaction, but soon coagulate, which is a kind of self-protection of the sperm, and then liquefaction, generally). Not more than 1 hour, otherwise it is poor semen liquefaction). If you need to find the cause of low sperm quality, we need to do seminal plasma biochemistry; if you want to determine whether the sperm insemination ability is normal, we need to do the sperm function measurement and so on. Therefore, the first laboratory test for male infertility patients is semen analysis, there is no other choice, please patients understand.