There is no authoritative data to show how long the pregnancy can rule out ectopic pregnancy, most women can rule out ectopic pregnancy by doing ultrasound examination after 35~40 days of pregnancy.
If a woman’s menstrual cycle is regular, an ultrasound examination on the 35th to 40th day of pregnancy can usually reveal a gestational sac or embryo bud in the uterine cavity. If the ultrasound examination on the 35th to 40th day of pregnancy does not reveal any gestational sac or embryo bud, and there is no echogenic area in the adnexa and other parts of the body, and at the same time, the pregnant woman is accompanied by pain in the abdomen, vaginal bleeding and other manifestations, it is considered to be due to ectopic pregnancy.
If a woman’s menstrual period is irregular, and if the pregnancy sac is not detected by ultrasound after 35-40 days of pregnancy, she needs to be rechecked after 1 week, which can help to exclude whether ectopic pregnancy occurs.
It is recommended that women go to the hospital for regular checkups during pregnancy, and the doctor will determine whether ectopic pregnancy has occurred based on the specific conditions of the pregnant woman and the results of the checkups.