Causes and Symptoms of Miscarriage

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Miscarriage occurs when baby stops growing and weighs 500 grams or less. According to one of the medical source, fifty percent of the pregnancies end in miscarriage. This happens more often when a woman misses her first menstrual cycle and even when she knows about her pregnancy.
Pregnancy miscarriage in the first three months of pregnancy is eighty percent. Those miscarriages which occur after twenty weeks of pregnancy are termed as late miscarriages. What are the pregnancy miscarriage symptoms? Severe cramps in the abdomen, vaginal bleeding, back pain, fever and weakness.