The first sign of miscarriage has been a week without bleeding and a little dark red blood may be the cause of the accumulation of blood in the uterine cavity or the failure of abortion preservation and so on. 1. Uterine blood: preeclampsia is mainly manifested as a small amount of vaginal bleeding and paroxysmal pain in the lower abdomen, ultrasound and progesterone test to assist in the diagnosis, most of the vaginal bleeding stops after the treatment of abortion preservation, and repeat ultrasound can be seen in the embryo or fetus is well developed. However, there may be a small amount of blood in the uterine cavity, and after the blood is discharged, dark-colored vaginal bleeding may occur, so you can go to the hospital to clarify the fetal situation. 2. Failure of fetal preservation: Although vaginal bleeding stops after treatment of preterm miscarriage with fetal preservation, if the embryo is not well developed in ultrasound examination or the blood HCG (human chorionic gonadotropin) does not rise or fall, it indicates that there is failure of fetal preservation, and the symptom of vaginal bleeding will occur again, and it is necessary to terminate the pregnancy according to the doctor’s advice. If you have had a preeclamptic miscarriage for a week without bleeding and then have a bit of dark red blood, you need to go to the hospital in time to find out the cause of the miscarriage and deal with it positively.