mini: My wife is on the mini pill right now since she is still breastfeeding out 3-month old son. A few days ago she thought her period was starting because she was having some spotting, but now the spotting has gone away and her period never came. Is a weakened or absent period sometimes a side effect of taking the mini pill? Thanks.Is one of the side effects of the mini pill a weakened or absent period?yes, it can be. When I started the mini-pill I had a really bad period for 2 weeks, and now have not had another (its been about 11 weeks since I've been on it) The mini-pill does not regulate your period b/c it doesn't have that hormone in it (hence the "mini-pill")Is one of the side effects of the mini pill a weakened or absent period?Yes, you are a sweet husband for worrying for her. Even the mini pill can cause your period to be light or even not have one. Most women will only have slight spotting when on any type of contraceptives.Is one of the side effects of the mini pill a weakened or absent period?yep