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Spotting in early pregnancy is fairly common, but it should never be considered normal, and it always warrants a call to your ob-gyn, Dr. Landy says. Although the presence of spotting does not always indicate a miscarriage, it is a sign that something abnormal may be going on in the pregnancy, she adds.
Women pregnant with their second or third (or more!) child will often show earlier because the tissue holding the contents of the abdomen in place (the fascia), has been stretched before and gives more easily, allowing a growing uterus to pop out earlier.