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 test usually involves a glucose tolerance test (GTT), where you have to fast (not eat or drink) overnight. Your blood is tested, then you drink 75 gm of glucose in a sugary drink. You have your blood tested twice more â after one hour and after two hours. If you have high blood sugar levels on a glucose tolerance test, youâll be diagnosed with gestational diabetes.