A woman of childbearing age can become pregnant any time she has sex without contraception, regardless of whether it is the first time she has sex. If a woman is ovulating, for women with regular menstrual cycles, the chances of pregnancy are higher around 14 days before the next menstrual period. If you have sex without contraception, you may become pregnant, and you should take the following measures: first, take oral contraceptives after sex, usually within 72 hours, such as Mifepristone or Yutin, which are recommended by a physician. Secondly, for women with no recent fertility requirements and excluding contraindications to intrauterine device placement, intrauterine device placement is an option. If all of the above methods fail, terminate the pregnancy as soon as possible after determining the pregnancy, you can choose abortion or medication abortion, which needs to be applied within 49 days of pregnancy. After abortion, it is recommended to implement effective contraceptive measures to avoid another unwanted pregnancy, and you can choose compound oral contraceptive drugs.