Use online Calorie Calculator as possible on MayoClinic.com to get an estimate of the number of calories that you need to take in every day to avoid weight gain.
Write down the number of calories in everything you eat every day. Keep the amount of calories you are at or below the amount of calories needed to maintain your weight.
Keep lots of healthy snacks on hand, such as fresh fruit and vegetables and low-fat dairy products, to help you adjust to your appetite increases.
Get plenty of exercise to burn calories, control your appetite and reduce body weight is water. Try to exercise at least 30 minutes every day of the week.
Increase Your fluid intake to help prevent water retention caused by hormonal changes. Reduce Your sodium intake to 1,500 mg or less per day to further help reduce and prevent water weight gain.
Talk to your doctor about other forms of birth control if you have trouble controlling your weight even with a healthy diet and exercise plan.