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 glucose tolerance test is used to help diagnose gestational diabetes and type 2 diabetes. There are three versions of the oral glucose tolerance test: the 1-hour test, the 2-hour test, and the 3-hour test. In the eight hours leading up to the test, you should not eat food or drink any beverages aside from water.