It is advisable to consider pregnancy after 3 months after the dental film, because after all, there will be residual radiation in the body, so it should be cleared out slowly, and it is safe after 3 months. In addition, it is also recommended that both spouses should enhance nutrition, stay away from smoking and alcohol and get enough sleep during the preparation period, and that they should undergo appropriate health checks before pregnancy, including liver and kidney function tests, routine blood and urine tests, screening for AIDS and syphilis, sex hormone six tests, thyroid function tests, ultrasound tests, eugenics five tests, routine laboratory tests of the white belt and gynecological examinations, all of which should be normal before preparing for pregnancy. Clinical preparation for pregnancy.