One-hour glucola test You will be asked to take the one-hour glucola test between 24 and 28 weeks of your pregnancy. It is a screening test for gestational diabetes. As a screening test, it is used io determine which patients are at risklor gestational diabetes and need -the 3-hour glucose tolerance test. If vour one-hour test shows that you need to take the 3-hour test, we ask that you make an appointment at the lab for the test. Once you have made the appointment, you need to follow a special diet for the 3 days prior to the glucose tolerance test. You may have nothing to eat or drink other than water for the 12 hours before your appointment. A laboratory slip will be left at the front desk for you to pick up. You must call Unilab to schedule an appointment. If you have gestational diabetes as determined by the test, you will be referred to a special program that helps you with your diet so that your sugar levels remain normal throughout the remainder of your pregnancy. Three-hour glucose test diet  This is a 150 gram carbohydrate diet. You will need to eat at least this many carbohydrate foods for 3 days prior to taking the glucose tolerance test. You may add extra carbohydrate foods if necessary. The * indicates carbohydrate containing foods. You may make substitutions but you may not omit carbohydrates. If the meals are too large, you may use part of each meal allotment for snacks. BREAKFAST * 2 slices of toast or 1 1/2 cups of cereal or 1 English muffin * 1 cup of low fat milk or nonfat milk 2 eggs or 2 oz. cheese or 2/3 cup cottage cheese 2 teaspoons margarine or butter 1/2 cup fruit LUNCH * 2 slices bread or 1 cup rice or 1 cup pasta 3 oz. of meat, fish, poultry, or cheese * raw vegetables/salad 1 or 2 teaspoons mayonnaise, margarine, or salad dressing 1 piece fresh fruit * 8 oz. of low fat or nonfat milk DINNER 4 oz. cooked meat, fish, or poultry * 1 medium potato or 1 cup rice or 1 cup pasta or 2 slices bread * cooked vegetables * green salad with 1 tablespoon of dressing 1 teaspoon butter or margarine * 8 oz. of low fat or nonfat milk For anyone who cannot drink milk, you may substitute one of the following foods: 8 oz. plain yogurt or 4 to 6 crackers Fast for 12 hours before your appointment. You may have water only.