Do this. Don't do that. With all the pregnancy advice out there, it's hard to know what to believe -- or whom to believe. But remember, every pregnancy is different, so follow your doctor's orders above all else.

Myth 1: Eat Three Healthy Meals a Day
False! You should be eating six or seven small meals every two to three hours. "Eating frequently and from various food groups will keep your blood sugar in a constant range, which is healthy for you and your baby," says Stuart Fischbein, MD, coauthor of Fearless Pregnancy.

Myth 2: You Can Drink Alcohol
True! If you want to toast your sister at her wedding with a glass of bubbly, "go ahead," says Mary Jane Minkin, MD, a clinical professor of obstetrics and gynecology at Yale University School of Medicine and coauthor of A Woman's Guide to Sexual Health. "One glass of wine isn't going to hurt the baby," she says. But one glass here and there doesn't mean nine -- in fact, two or more alcoholic drinks daily can lead to fetal alcohol syndrome. So while it's best to cut out alcohol completely, Dr. Minkin says that an occasional small glass of wine with your pasta primavera is harmless.

Myth 3: Decaf Only
False! One small cup of coffee a day is perfectly fine. While a recent study at McGill University in Montreal did find that the caffeine in two to three cups of coffee a day increases the risk of miscarriage, it didn't consider how the coffee was brewed and the type of coffee used. Dr. Minkin points out that a French blend served black is much stronger than a weak cup of American coffee mixed with milk. It's another controversial subject for sure, but moderate caffeine intake isn't likely to harm you or your baby. The same goes for sodas with a caffeine jolt.