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.
The first method can be done in two steps. You do not need to stop eating or drinking before the first step. In this step, you drink a liquid that contains 50 grams of sugar (glucose). Your blood sample is taken 1 hour later. If you don't have a lot of sugar in your blood, you do not have gestational diabetes.