To have an abortion, it is usually better to choose to perform it on the 40-50th day of pregnancy, which is about one and a half months of pregnancy, because the size of the gestational sac is more moderate at that time, and the abortion is less damaging to the body and the recovery is faster. However, this is only based on the normal growth rate of the gestational sac, and an ultrasound examination of the gestational sac is needed to determine its condition. If the gestational sac is large and there is more tissue in the uterine cavity, the abortion will take longer and cause more damage to the body. Therefore, if you are pregnant, you should go to the hospital for ultrasound in time around 40 days after menopause to check the condition of the gestational sac, and if the diameter of the gestational sac is larger than 1cm, you can have an abortion.