A member asked:

Why has my period started a week early? i take sprintec birth control.

A doctor has provided 1 answer

Depends: Sometimes extremes of weight (thin or heavy) can affect timing of period while on birth control. Sometimes the strength of the birth control (lower estrogen). Sprintec has 35mcg of estrogen, one of the higher doses that's out there. If you missed any pills, that too could cause period to start a week early. Hope that helps.

Answered 8/7/2013

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