Calcium tablets are good if you don't get enough from your diet - I started taking them when I got my bfp as I read that the baby drains a lot of your calcium thru pregnancy and i don't have very much in my diet. If you do decide to take them, get the Caltrate Plus as they have zinc and magnesium too which you need to absorb the calcium, otherwise it is wasted. From what my doc said there is no risk in taking them, so I figure you may as well.