High blood glucose in men may affect the chance of pregnancy, so they need to actively control their blood glucose. The main factor affecting the chances of pregnancy is the quality of male sperm, high blood sugar will affect the male sexual function, resulting in impotence, premature ejaculation, etc., may also affect the quality of male sperm, so it is recommended that men control their blood glucose within a reasonable range before preparing for pregnancy. Moreover, high blood sugar will bring burden to the body organs, affecting the balance of the body’s endocrine, thus increasing the chances of type 2 diabetes. It is important to note that if you are preparing for pregnancy, you should quit smoking and drinking, get enough sleep, pay attention to balanced nutrition, and actively participate in sports to improve sperm activity. If you find that your blood sugar is too high, it is recommended that you seek medical attention.