At any stage of pregnancy, bleeding is abnormal, and so are excessive discharge and acute abdominal pain. It may be due to many cases, so, professional advice should be sought.
An abortion is the discarding by the uterus of the products of conception before the 24th week of pregnancy. It is no different to a miscarriage, though may hold the view that an abortion is something that is induced and a miscarriage is something that occurs spontaneously.
Threatened abortion: bleeding the during the first 24 weeks of pregnancy. It is not usually accompanied by any pain.
Inevitable abortion: a threatened abortion that becomes an inevitable abortion if the woman experiences pain because of uterine contractions or when, the cervix or neck of the uterus is found to be opening when examined, such that abortion must inevitably occur sooner or later.
complete abortion: occurs when all the products of conception have been passed from the uterus.
incomplete abortion: a condition in which part of the products of conception have been passed but some still remain within the uterus. A missed abortion occurs when the pregnancy has died within the uterus but the uterus has still failed to expel it. The dead pregnancy will have to be aborted sooner or later. An ultrasound scan is needed to diagnose this.
recurrent abortion: a miscarriage on three or more times.
habitual abortion: reserved for miscarriage on three or more occasions at approximately the same stage of pregnancy. Therefore, assumed to be for the same reason each time.