The bleeding that occurs while you take the inactive pills isn't the same as a regular period. Nor is the bleeding necessary for health. This is good news if you take birth control pills and want more control over your menstrual cycle, either for personal or medical reasons.
To prepare for the glucose tolerance diagnostic test: 1  Eat a balanced diet that contains at least 150 grams (g) of carbohydrate per day for 3 days before the test. Fruits, breads, cereals, grains, rice, crackers, and starchy vegetables such as potatoes, beans, and corn are good sources of carbohydrate.
A bagel makes a good test food. If you can't eat wheat, a large (8 oz) boiled potato of a cup of cooked white rice will do. Avoid eating fats along with your test food as they can slow down the action of the carbohydrate. One hour after you started eating, test your blood sugar with the meter. Write down the result.