The difference between hysteroscopic embryo retrieval and painless abortion includes: 1, hysteroscopic embryo retrieval: is under the direct vision of the hysteroscope, embryo adsorption, and then scrape it out of the uterine cavity. Clinical generally do not advocate the adoption of this procedure, because the expansion of the uterus tension, will be chorionic villi or residual tissue through the fallopian tubes into the abdominal cavity, resulting in infection, causing other adverse factors; 2, painless abortion: does not have the process of expanding the uterus, the patient is often in a painless abortion, but it can also cause the patient’s endometrial damage.