You can have an abortion on day 43 of pregnancy, but you need to exclude ectopic pregnancy. Generally, abortion is suitable for pregnant women within 70 days of pregnancy, and the best time is 40-55 days of pregnancy. Therefore, if the pregnancy is determined to be intrauterine on day 43, and the ultrasound examination reveals that the gestational sac is not large and the uterine wall is thick, so the gestational sac can be easily removed, then abortion can be performed. If an abortion is performed at the right time, it is relatively less harmful to the body, less risky and quicker to recover. However, if the abortion is done too early, because the embryo has just started to develop, it is easy to have empty or missed suction during the operation, resulting in failure of the operation or incomplete abortion, which may require another cleaning. If the fetus is too big for the abortion, the fetal skeleton has formed, the uterus is bigger, the uterine wall is thinner, the operation will be more difficult, the fetal limb will easily scrape the uterine wall, and the operation will take longer, bleed more, and the recovery time after the operation will be longer, and the pain to the woman will be greater. If the ultrasound confirms that the pregnancy is ectopic, the abortion cannot be performed and hospitalization is required for treatment. At present, you can choose from painless abortion, ordinary abortion, etc. You need to take the appropriate method according to your situation. After the operation, you also need to review the ultrasound examination to observe the condition of the uterine cavity and the endometrium, and if necessary, adjust the menstrual cycle through medication to prevent the appearance of menstrual irregularities, and use contraception for at least 3 months after the operation.