An inevitable miscarriage (or spontaneous miscarriage) is one where the miscarriage is imminent or is in the process of happening. Causes for signs of miscarriage include (but are not limited to): Hormonal problems, infections or maternal health problems, Lifestyle (i.e. smoking, drug use, malnutrition, excessive caffeine and exposure to radiation or toxic substances), Implantation of the egg into the uterine lining does not occur properly, Maternal age, Maternal trauma.
If you have had signs of bleeding and cramping, your should contact your care provider. He or she will recommend an ultrasound to see whether or not your pregnancy is proceeding normally or that you have had a miscarriage. Vaginal ultrasounds can be done as early as 5-6 weeks of pregnancy.