When you start using birth control pills, your periods will
be regulated by the hormones in the pills. This can cause your periods to
change. Birth control pills can cause bleeding between periods, and your
periods are likely to be lighter or you may not have periods at all. It is very
important to take your pills at the same time every day.
changes caused by the use of progesterone (such as Depo-Provera, Implanon or Nexplanon, or
mini-pills) are different for every woman. You may have normal periods,
bleeding between periods, irregular bleeding, or no periods at all.