Any of these are perfect to take just after delivery of the baby. You would most probably be taking a prenatal vitamin up until that point, so that time would be a great time to switch. You want it to start enriching your breastmilk right away to give the infant all of the nutrition you can straight from the start. Some of these supplements also enhance the taste and vitamins in the breastmilk that the baby would need right away. So, if you are going to breastfeed, then right after you have the baby is a great time to start with a vitamin supplement.