Bleeding is a serious sign/symptom of possible miscarriage, but does not always indicate a miscarriage. About 20% of all pregnant women experience vaginal bleeding in the first trimester. Another 5% experience the same symptoms in the second and third trimester of pregnancy. Only half of those who bleed will miscarry. Sometimes bleeding may be the result of cervical inflammation, either a polypus inflammation or a physiological inflammation. These types of inlammation occur during expected ovulations and normal menstrual periods that the body skips as a result of pregnancy. Miscarriages before the 12th week are called “early”; those from 13th to 20th weeks are called “late”. From the 21th to the 38th weeks there are no miscarriages; these are termed "premature childbirths". Injury is a very rare reason for vaginal bleeding and miscarriage in the second trimester of pregnancy. The most common reasons for miscarriages in this trimester are fetal anomalies, uterine malformations and tumors (cervical insufitiention, placenta’s diseases, cervico-vaginal infections, etc.) Vaginal bleeding is the result of diseases within the placenta (placenta praevia, abruption placenta pretemporalis). In your case, there is hope for a healthy birth as long as the fetus is alive.