Could be: The birth control pills we use today contain only a low dose of estrogen or even no estrogen . The progestin provides the contraception and estrogen gives cycle control by stimulating growth of the uterine lining.Because there is only a little lining growing there is little to bleed off and u may skip periods or only see a little spotting that can look brown or black if u r on a very low dose pill
Answered 6/26/2015
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