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A member asked:
I recently switched birth control pills from 28 day 1/20 to 21 day 1.5/30, and 1 day late period. could the switch be causing it?
A doctor has provided 1 answer
Yes: Changing oral contraceptive formulations can affect your next 1 to 3 menstrual cycles. Not to worry as long as you have been taking your pills correctly and consistently. If not, check a pregnancy test. Take Care!
Answered 5/8/2015
2.9k views
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