Truth be told, no one knows why cravings happen. Some experts say they may be nature’s way of providing nutrients an expectant mom may be lacking. Others say they’re an emotional thing. Regardless, as long as you’re eating an overall healthy diet, it’s usually OK to give in to your cravings. Just be careful to limit portions — don’t down all that ice cream at once! — and know which snacks to steer clear of. A few foods to avoid: raw and undercooked meat or eggs; brie, feta, and other types of unpasteurized cheese; herbal teas; and raw sprouts.