No iron in prenatal vitamin?

heatherroneous

I noticed today that my prenatal vitamin does not have any iron in it.  I had always thought that prenatal vitamins had extra iron and this was what caused pregnant women to have intestinal troubles.  (I certainly assumed that was why I was so constipated yesterday, when it's very early in my pregnancy.) 

 

Is it normal to have an iron-free prenatal vitamin?  The one-a-day I was taking before I got pregnant doesn't have iron in it either.  I thought iron was important to the development of the placenta?  Is anyone out there taking an iron supplement or a prenatal vitamin with iron?