• Knowledgebase: Questions about Sex, Puberty, and Periods

    Questions about Sex, Puberty, and Periods, for adolescents and their parents.

    2. Will the birth control pill cause a girl to miss her period? - Top

    Sometimes. Some women may have a shorter period, or no period at all while on the pill. However, the pill is not 100% effective, and it is possible to become pregnant while on the pill, thus missing a period. - Updated: March 23, 2001

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    • James L Horwitz, MD

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    Barbara Lindberg, PNP