At six weeks of pregnancy, the tissue expelled by the body as a result of a miscarriage would look similar to heavy menstrual bleeding with no visible fetus or placenta present, according to Our Bodies Ourselves. This passage of tissue will be accompanied by cramping and bleeding similar to a regular monthly cycle and should lessen and taper off over the course of several days, according to Our Bodies Ourselves.
In the case that a pregnancy has ended but the tissue has not spontaneously been expelled, a suction curettage or dilation and curettage may be used to remove the fetus in a doctor's office, according to BabyCenter. Vaginal bleeding and abdominal cramping are the early signs of miscarriage, and it is important to contact a doctor or midwife should these occur at any point in pregnancy, according to BabyCenter.
Miscarriages most commonly occur early in pregnancy due to chromosomal abnormalities and implantation problems with a fertilized egg, according to BabyCenter. However, in most cases early miscarriage is considered a random event, but in the case of two or more early miscarriages, medical treatment is required to determine the cause of the miscarriages, according to Our Bodies Ourselves. Age, a history of miscarriage, cervical or uterine problems, chronic disease, infection, smoking and obesity increase the risk of miscarriage, according to BabyCenter.