Here are some steps you can take to help prevent missed or irregular periods.

• Avoid fad diets that greatly restrict calories and food variety, and avoid rapid weight loss. To maintain a healthy weight, focus on eating a variety of low-fat foods. For more information, see the topics Healthy Eating and Healthy Weight.
• Use contraception consistently, as directed by your health professional. For more information, see the topic Birth Control.
• Increase exercise gradually. For more information, see the topic Fitness.
• Learn and practice relaxation exercises to reduce and cope with stress. For more information, see the topic Stress Management.

If you participate in endurance sports, you may miss periods or stop menstruating. Eat a healthy, balanced diet and keep track of your periods. Tell your doctor about any changes in your menstrual periods.