About 33 percent of teen women missed a pill in a three-month period. About 17 percent do not take the pills in the right order. Taking a rest from the Pill can lead to unintended pregnancy. Discontinuing and restarting the Pill may cause another round of the unpleasant side effects that may be associated with the first few months of pill use. Women who discontinue the Pill sacrifice the non-contraceptive benefits of the Pill.
Some women gain weight while using the Pill.
Some women lose weight while using the Pill. Hormones in the Pill may cause changes in appetite. These changes occur over several years and may cause some weight loss or gain. Some women have temporary fluid retention during the first month or so after starting the Pill. Some women gain weight as a side effect of estrogen use.