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Male Infertility What is male infertility? Infertility is a disease of the reproductive system. It makes a person unable to have children. It can affect a man, a woman, or both. Male infertility means that a man has a problem with his reproductive system. It means you can't start

Communication Disorders in Children What are communication disorders in children? A child with a communication disorder has trouble communicating with others. They may not understand or make the sounds of speech. The child may also struggle with word choice, word order, or

Down Syndrome (Trisomy 21) in Children What is Down syndrome in children? Down syndrome is a genetic disorder. It is also called trisomy 21. It includes certain birth defects, learning problems, and facial features. A child with Down syndrome also may have heart defects and

X-Linked Agammaglobulinemia in Children What is X-linked agammaglobulinemia in children? X-linked agammaglobulinemia is a rare genetic disease. It causes a weakened immune system. It is also known as Bruton's agammaglobulinemia. X-linked means that the gene that causes this

Tongue-Tie (Ankyloglossia) in Children What is tongue-tie in children? Tongue-tie (ankyloglossia) is a problem with the tongue that is present from birth. It causes speech and eating problems in some children. The lingual frenulum of the tongue is a small fold of tissue that

Endometriosis What is endometriosis? The tissue that lines the uterus is called the endometrium. Normally, if a woman doesn’t get pregnant, this tissue is shed each month during her period. In endometriosis, tissue that looks and acts like endometrial tissue implants outside the

Spinal Muscular Atrophy in Children What is spinal muscular atrophy in children? Spinal muscular atrophy (SMA) is a disease of the nerves and muscles caused by certain genes. It affects the motor neurons in the spinal cord. It causes muscle wasting and weakness. What causes

Cytomegalovirus (CMV) in Newborns What is CMV in newborns? CMV (cytomegalovirus) is a type of herpes virus. It's very common. It affects people of all ages and in all parts of the U.S. In most cases, CMV causes mild symptoms, or no symptoms at all. But it can cause serious

Guillain-Barré Syndrome in Children What is Guillain-Barré syndrome in children? Guillain-Barré syndrome (GBS) is a short-term but often life-threatening disorder that affects the nerves in the body. GBS can cause muscle weakness, pain, and short-term (temporary) paralysis of the

Lymphadenopathy in Children What is lymphadenopathy in children? Lymphadenopathy means swelling of the lymph nodes or glands. These are the bean-shaped glands in the neck, armpits, groin, chest, and abdomen. These glands act as filters for lymphatic fluid. This fluid contains