The possibility of miscarriage is usually considered after 47 days of pregnancy with heavy menstrual flow and no blood after 7 days. Already 47 days pregnant under normal circumstances will not have menstruation, the appearance of vaginal bleeding more heavy like menstruation, to consider miscarriage. Further ultrasound and blood tests for human chorionic gonadotropin and progesterone can be done to assess the viability of the embryo. A part of the ultrasound examination can not see the gestational sac, the lining is relatively thin, the human chorionic gonadotropin is obviously reduced, it is considered to be a complete miscarriage, usually no longer need special medication, it is recommended to rest as much as possible, pay attention to warmth and hygiene, prevention of infections, and promote the body’s recovery. A part of the recheck human chorionic gonadotropin is still high, and ultrasound to see the uterus still have embryos or abnormal echoes, it is considered incomplete miscarriage, bleeding embryo continued to survive is usually unlikely. It is necessary to continue regular follow-up, under the guidance of the doctor to regulate the use of medication, until the lining of the uterine cavity back to normal human chorionic gonadotropin down to the non-pregnant range. In addition, some women who have vaginal bleeding after menopause and have not seen a gestational sac in the uterine cavity on ultrasound should also consider the possibility of ectopic pregnancy, and should be closely followed up, and hospitalization is usually recommended if the human chorionic gonadotropin continues to increase.