You really can start any time. Some people drink the tea all pregnancy. Im 31 weeks and will start with tea and capsules in the next week or so, which is what I did with my first. I would start on a low dose and build up to the max if you want (it should say on the bottle depending on strength). I think I started at 1-2 a day and built up to 2 capsules twice a day (4 total) plus I drank it as tea as I felt like it, probably a cup a day. But I would ease into it and see how you feel.