Premarital checkups are not mandatory, so even if women do the appropriate checkups before marriage, they are often not necessary, but it is advisable to do premarital checkups. Once an abnormality is found, it should be dealt with in a timely manner, and like some infectious diseases, such as syphilis and AIDS, if they can be detected before marriage, it will prevent cross-infection between the couple. But because premarital checkups are free of charge at the local community hospital or health center, couples who do not have a local marriage license can only pay for their own premarital checkups. The premarital checkups are mainly blood tests for routine blood, coagulation, and hepatitis B, syphilis, and HIV, as well as abdominal ultrasounds, such as liver, gallbladder, pancreas, spleen, and uterine attachment ultrasounds.