My DS is 21 months and still BF. I think I kept taking my prenatal vitamins for a little while when he was a newborn, but haven't taken them since then. I do take calcium supplements since we are on a dairy-free diet. I have really good nutrition so I just feel like I get what I need from food. I do feel a little guilty though - I know you are "supposed" to keep taking prenatals while breastfeeding?