J.C.
It is completely normal. BC pills DO NOT work by causing abortions, that is absolutely ridiculous!!! In fact, you do not ovulate when taking the pill, that is why it is unnecessary to have a monthly period when taking the pill, and why some pills offer ways to have less periods each year. Most woman will experience lighter periods with less cramping when on the pill, that is why they often give it to woman who have problems with heavy bleeding or cramping even when they are not sexually active.