I know some people take ages to get pregnant whereas there are people who got pregnant right after they are off the pill. I think there is no standard. However it is always best to wait for 2 to 3 months before you start trying so that your body can adjust back to normal cycle. I think there shouldn't be any bad effects to the baby since there are mothers who got pregnant even when they are on the pill. Their babies are fine so it should be ok. Of course, you should stop taking pill and consult your doctor if you got pregnant when you are still on pills.