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The ligaments that support the uterus will stretch and with this stretching may cause mild cramps. 3. Miscarriage-Cramping during early pregnancy, especially accompanied by spotting or bleeding, is a warning sign of a possible miscarriage.
Implantation is the most common cause of cramping during the early stages of pregnancy. In the first few weeks of pregnancy, the uterus begins expanding to accommodate the growth of the baby. Round ligament pain can also contribute to cramping.