Talia is 31/2 and I didn't go back on the pill til she stopped breastfeeding when she was 20 months old. So probably about a year and a half to 2 years. I conceived really quickly with her. Just wanted to know really if there is any medically reason to not start trying as soon as your off the pill. Do the drugs build up in your system? Do they affect bubs development if they are not all out of your system when you conceive?