My cousin started having her children at an early age (14), and she had 6 by the time she was 21
...which is a whole 'nother story! She's turning 30 in Dec., but anyway...during each of her pregnancies she craved and ate AJAX and ice. I can remember her sitting on the couch "Indian-style" with a economy size box (not a can, but the box!) of AJAX in her lap and a mixing bowl of ice sitting next to her. She would sit and eat this for hours. It would gross me out and make me so mad because I was scared that she was hurting the baby, but each of her children were just fine.
My other cousin which is pregnant with her 2nd child, craves Cherry Cinnamon Rolls...and she is allergic to cherries!!! However, that doesn't stop her from eating an entire package!