I have worked in urology and men’s clinics for many years and have come across many male patients who come for preconception testing, many of whom are dragged by their wives and come to the clinic with the vibe that they must not have a problem. Now these common misconceptions are summarized, see if you too have ever thought so? 1. My previous girlfriend was pregnant, so I’m sure I won’t have a problem. Many men think that because their previous girlfriend or wife was pregnant, they will not have a problem now. In fact, male infertility is divided into primary infertility and secondary infertility, the former refers to the girlfriend or wife has not been pregnant, the latter refers to the girlfriend or wife was pregnant or childbirth, now more than a year still can not get pregnant. In reality, there are many reasons that can lead to the decline of male fertility and secondary infertility, the common ones are: varicocele, reproductive system infection, drugs, radiation, smoking, alcohol, drugs and other bad lifestyles, and it is also an indisputable fact that age leads to the decline of fertility. Therefore, the notion that if you could get pregnant and give birth before, you must be fine now is very wrong. 2. I have good sexual function, therefore, my fertility is not a problem. A normal sexual life is a prerequisite for having the next generation, but good sexual function is not the same as good fertility. Sexual function mainly depends on the hardness and duration of the erection of the penis, while the key to fertility lies in the number and vitality of sperm, which differs greatly. There are many men with good sexual function, but when they check their semen, they find that the sperm is very poor, or even no sperm, and their fertility can be imagined. 3, my semen volume is normal, how can there be no sperm? Some men come to have their semen checked and the doctor tells them that there is no sperm, so they ask this question. In fact, although normal people have a huge number of sperm, 200-300 million per ejaculation, but sperm only account for about 1% of the volume of semen, most of the semen is seminal vesicle fluid and prostate fluid, therefore, whether there is sperm in the semen just by the amount of semen and the naked eye can not be seen, only put under the microscope to determine. If no sperm is found under the microscope, the doctor also needs to centrifuge the semen and take the precipitate after centrifugation and re-observe it under the microscope, if still no sperm is found, it is azoospermia. 4. My siblings are normal, therefore, there must be no problem with my chromosomes. Some male infertility patients have problems with semen quality and their doctors recommend chromosome examination. Patients may think that their parents and brothers are normal and therefore unnecessary, which is actually a wrong view. Although the chromosomes are from the parents, but in the formation of the embryo may occur displacement, inversion, non-separation and other abnormalities, such as some infertile men with Creutzfeldt-Jakob syndrome, chromosome 47XXY, is due to the X chromosome from the mother did not occur separation, while their siblings may be completely normal. 5, miscarriage is a woman’s problem, and I have nothing to do with it. Many men think that if they can make their wives pregnant, it means they have no problem, and that miscarriage after pregnancy is a woman’s problem and has nothing to do with men. In fact, although there are many reasons for miscarriage, poor embryo quality and poor development potential is an important reason for embryonic abortion and miscarriage, while poor sperm quality will not only lead to difficulties in pregnancy, but also increase the probability of embryonic abortion and miscarriage after the wife gets pregnant. People used to blame women for their inability to have children, but nowadays this kind of thinking is rare, but there are still many macho men who always think they have no problem. According to the World Health Organization, male factor accounts for about 50% of infertility, therefore, men should understand themselves correctly and take up their half of the responsibility bravely.