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Cystic Fibrosis and the Digestive System How does CF affect the digestive system? Children with cystic fibrosis (CF) have a protein in their cells that doesn't work right. The protein is called CFTR (the cystic fibrosis transmembrane regulator). CFTR controls the flow of water

The Menstrual Cycle: An Overview What is ovulation? When a young woman reaches puberty, she starts to ovulate. This is when a mature egg or ovum is released from one of the ovaries. The ovaries are the two female reproductive organs found in the pelvis. If the egg is fertilized

Understanding Your Child's Lymphatic System What is the lymphatic system? The lymphatic system is a part of the body’s immune system. It works to fight disease and infection. The lymphatic system goes through many changes during a child's growth. Before birth, a baby is protected

Fibrocystic Breast Changes What are some common fibrocystic breast changes? Fibrocystic breast changes are symptoms you may feel in your breasts right before your period. Your breasts may feel lumpy, swollen, or sore. This is a very common condition. It is not a disease. It is

Traveling with a Chronic Condition Take care when traveling with a chronic condition Chronic conditions should not prevent you from enjoying travel. As with other medical conditions, if you have a chronic disease, you should see your healthcare provider as early as possible

Allergens: Animals What is an animal allergen? Allergens found in animals are a common cause of allergic reactions. They are caused by the proteins found in an animal's: Skin (dander) Saliva Urine Household pets such as cats and dogs are the most common sources of animal

Anatomy of the Endocrine System The endocrine system is a complex network of glands and organs. It uses hormones to control and coordinate your body's metabolism, energy level, reproduction, growth and development, and response to injury, stress, and mood. The following are key

Symptoms and Diagnosis of Multiple Pregnancy What are the symptoms of multiple pregnancy? Each woman may have slightly different symptoms. But the most common symptoms of multiple pregnancy are: Uterus is larger than expected for the dates in pregnancy More morning sickness

Birthmarks What are birthmarks? Birthmarks are areas of discolored or raised skin that are seen at birth or within a few weeks of birth. Birthmarks may be made up of malformed pigment cells or blood vessels. Medical experts don’t know what causes birthmarks. But most of them are

The Thyroid Gland Anatomy of the thyroid gland The thyroid gland is found in the front of the neck. It sits below the voice box (larynx) and on top of the trachea (windpipe). It has a butterfly-like shape. The small, 2-inch gland consists of 2 lobes, 1 on each side of the