Abdominal pain after miscarriage means spontaneous abortion.

Fetal arrest refers to the cessation of embryo development. Stomach pain generally refers to abdominal pain. Abdominal pain after the embryo stops developing may be a sign of spontaneous abortion or other reasons. If the symptoms are more serious, it is recommended to go to the hospital in time for treatment and, if necessary, perform uterine curettage to avoid increasing the chance of heavy bleeding. The specific situation is analyzed as follows:

1. Spontaneous abortion: After the embryo stops developing, the detachment of the villi and decidua may lead to opening of the blood sinuses and vaginal bleeding. Vaginal bleeding and the detachment of the embryo will stimulate the uterus and cause contraction, which will expel the embryo and its appendages from the body, and may also cause abdominal pain symptoms.

1. Spontaneous abortion: After the embryo stops developing, the detachment of the villi and decidua may lead to opening of the blood sinuses and vaginal bleeding. Vaginal bleeding and the detachment of the embryo will stimulate the uterus and cause contraction, which will expel the embryo and its appendages from the body, and may also cause abdominal pain symptoms.

2. Not a spontaneous abortion: If the embryo stops developing for a long time and is not effectively treated, it may cause endometrial infection and abdominal pain. In addition, it may also lead to missed abortion, causing decidua to become difficult to separate from the uterine wall, and may increase the chances of uterine perforation and heavy bleeding. This situation is relatively dangerous, and it is recommended to seek medical attention in time and receive emergency treatment from a professional doctor.