It takes at least 7 days of continuous use before your birth control pills are effective. It can take your body from 1 to 3 months to become adjusted to being on the pills. During this time, you may experience some irregular spotting or bleeding. In the beginning, your periods may come a little before or a little after the placebo pills start. Continue taking your pills every day, starting new packs on time as scheduled. Any irregular bleeding or spotting should resolve within a few months. By then, your periods should be coming on a regular basis as well.
12. February 2012
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