I love eating the dirt/clay that's at my dad's ranch and only that dirt (when pregnant). My first pregnancy it was dirt and concrete. There was something about the grainy texture of them and taste. My iron was also low during my first pregnancy. Now in my second pregnancy and one month to go, it's dirt and the smell of my powder laundry detergent. My iron is fine so I'm not sure if iron is the cause of my pica but I have been told that when I was really young I would eat dirt all the time. It creeps out my husband so I try to eat it when he isn't around or I go to another room. My midwives are so interested because most women do bring it up.