It's probably the oldest pregnancy cliche in the book, but it seems like every woman has had some strange craving during her pregnancy. In fact, about 75% of women get cravings. The cravings range from a constant craving for a particular food, such as potato salad or pickles, to strange combinations, such as anchovies and ice cream, to the downright dangerous, like ashes or laundry detergent.
As your hormone levels change, the chemical content of your blood changes, which is often reflected in your saliva. This causes the taste in your mouth to change so foods will taste different than before.