Artificial insemination usually requires an interval of about 2~3 months, but it should be evaluated according to the specific spermatogenesis. If there is no problem with the spermatogenesis but the 1st IUI failed, you can choose to take another one about 2~3 months apart, which has a higher success rate of IUI. However, if the male spermatogenic function itself has problems or the semen viability is not quite enough, then after extracting the sperm once, it may take a longer interval before extracting the sperm for the 2nd time, otherwise it will not be able to meet the requirements of the test tube, and it will also easily affect the success rate of artificial insemination. If you choose to do artificial insemination, it is recommended to go to the hospital regularly to check the sperm viability and survival rate. If there is any problem with the sperm, try to regulate it before doing artificial insemination, and do not be negligent so as not to affect the fertilization plan.