Conditions and Treatments

Failure to thrive is defined as decelerated or arrested physical growth (height and weight measurements fall below the fifth percentile, or a downward change in growth across two major growth percentiles) and is associated with poor developmental and emotional functioning.

Fetal echocardiography is an ultrasound test performed during pregnancy to evaluate the heart of the unborn baby.

Using fetal ultrasound of the heart, defects can be detected as early as 16 to 18 weeks gestation, and in some cases, as early as 11-12 weeks gestation.

The body has several ways to maintain normal body temperature. The organs involved in helping with temperature regulation include the brain, skin, muscle, and blood vessels.

Fibromyalgia, also called fibrositis, is a chronic, widespread pain in muscles and soft tissues surrounding the joints throughout the body, accompanied by fatigue. Learn more about this condition.

Fifth disease is a moderately contagious viral illness that causes a rash on the skin, but no fever, as with other viral illnesses. It is spread from one child to another through direct contact with discharge from the nose and throat and can also be spread through contact with infected blood.

In some cases, accidental poisoning of a child can be treated at home. You will need to follow the directions of a poison control center or your child's healthcare provider. In other cases, a child will need emergency medical care. Learn more about first aid for poisonings in children.

Fleas, mites, and chiggers often bite humans, but are not poisonous. It is sometimes difficult to assess which type of insect caused the bite, or if the rash is caused by poison ivy or other skin conditions.

Influenza (or flu) is a highly contagious viral infection and is one of the most severe illnesses of the winter season.