Is it normal to crave one food for breakfast, lunch and dinner during pregnancy?

Q: I'm almost five months pregnant and could eat creamed spinach for breakfast, lunch and dinner. Is a food craving like this just a normal part of pregnancy or something I should worry about?

A: Experiencing a food craving during pregnancy often indicates that a woman is deficient in an essential nutrient. The classic "pickles and ice cream" craving is likely the result of a need for additional calcium, and perhaps a secondary need to satisfy the salty and sour taste buds. The nutrient most women lack is iron, and your craving for spinach--an iron-rich vegetable--certainly fits the bill. The cream in creamed spinach also may be soothing to a queasy stomach. As long as your craving is not an unhealthy one, pretty much any food is OK in moderation.