The real gestational sac out of the manifestation of white or flesh-colored chorionic tissue, the size of individual differences, the need for further ultrasound examination to rule out incomplete abortion. The gestational sac is a differentiated and developed chorionic tissue after the fertilization of the egg, generally white or flesh-colored manifestation, when the gestational sac is discharged out of the body can be seen in the vagina with white or flesh-colored chorionic tissue flow, the size of the chorionic is related to the number of days of pregnancy, in general, the longer the days of pregnancy, the chorionic tissue is relatively larger in size, there are individual variations. It should be noted that due to the mother’s uterine cavity during pregnancy in addition to the gestational sac there are pregnancy-related tissues such as meconium, when the gestational sac out of the body, the patient should be further examined in the uterine cavity whether there is any residue, to rule out incomplete abortion, in order to avoid the occurrence of infection, bleeding and other undesirable consequences, the need to carry out the removal of the uterus, if necessary, for treatment. When the patient miscarriage should be timely medical treatment, under the guidance of a professional physician for standardized treatment, in order to avoid delays in the condition leading to adverse consequences.