A couple ideas: It's normal to bleed for 5 days, but then 5 days of spotting afterward is frustrating. It could be an imbalance of hormones, too much progesterone, not enough estrogen. It could also be thyroid (less likely). Weight (thin/heavy) can also play a role. Best advice is birth control pill to help stabilize your uterine lining and then hopefully only 4 day periods will be the norm!
Answered 5/4/2014
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