It is also believed that contraceptive injections give some protection against cancer of the womb . Your periods will probably be quite different. Some women have periods that last longer. Others have light, irregular bleeding. None of this is serious, but some women feel anxious about the changes to their periods and others find these changes very annoying.
Some women find it something of a chore to have to go and get injected every eight or twelve weeks.
Many women put on weight, although this should be no more than about five pounds after using this method for a year. Some women seem to suffer depression while on the injections. After stopping the Depo-Provera injections, it can sometimes take up to a year for normal fertility to be restored. There is no way of 'undoing' the injection, so if you have any side effects you will have to live with them for eight or twelve weeks. Other possible side effects include headaches, tummy ache, dizziness, weakness and fluid retention.