You can die from having children no matter what your diet is - its the worst thing you could do to your body and in 3rd world countries that the primary cause of death for women as it was in this country until the last century.

However when you are pregnant drs monitor your iron - vegetarian or not, and they will advise you if you need to up your iron level. My friend/sister/mother are all anemic and they were given higher dose iron pills when they were pregnant and you can also get iron from green leafy vegetables. By the way there are millions of vegetarian women in the world who give birth everyday. When you are ready to start trying discuss diet options w your dr before you actually become pregnant.