Been on tri sprintec a yr now. i miss 2 pills week 1 and week 2 but not in a row. That was 4 pills missed there. I miss 3 in week 3 not in a row . I miss the last pills in week 3 that was on a saturday. i took it sunday. I had to wait til the drug store open before i started the new pack cause it was closed sunday may 8 so i took 2 pills monday may 9. I always have unprotected sex i dont take them at the same time. But i took the 2 monday my period suppose to came on may 11 like it normally do after i take my white pills. It usually come after i take the 3rd inactive pill. I started my new pack after i missed them in week 3 i missed some in the new pack it was about 2 or 3. . I had my period april 13. My period usually last about 5 days 0r 6 days. I was on dep but i got off them they messed up my cycle. on tri . I miss the pills in may it was bot 9.. So june 1 i stared bleeding. I didnt have no bleeding at all in may. After i stop bleeding i 4got to take sunday pills and now i have missed about 3 pills already.I had sex friday night june 10 he didnt *** out. I have got mixed up cause friday nite i woke up at 3 something in the morning and took 2 pills it was thursday and friday pill i took. I didnt take the june 11 pill that pill is saturday pill. So today is sunday june 12 do i take saturday and sunday pill today, but i be feeling something it probably gas but i dont really have gas problems. We had sex may 23 he didint come out but may 31 when we had sex he didint put it in me
well never mind I guess the link is not going to copy so I will just copy what it says : i-pill can work in any of three different ways depending on where you may be in your menstrual cycle.
It may stop an egg being released from the ovary.
If an egg has been released, i-pill may prevent the sperm from fertilizing it.
If the egg is already fertilized, it may prevent it from attaching itself to the lining of the womb.
It is important to note that pregnancy is established only after the fertilized egg attaches itself to the womb.
i-pill is ineffective if the pregnancy is established (i.e. the fertilized egg has attached itself to the womb). It is therefore not an abortion pill.
Here is a link that may or may not help answer you question. Hope it helps. http://in.*****************/question/index?qid=20101205074503AAXnhVb