Teen health
Learning Center
Infant reflux
Learn more about when a baby spits up food or liquid. Most babies outgrow this common and messy condition by the age of 18 months.
Infectious diseases
Viruses, bacteria, fungi and parasites can all cause infection. Find out more about how to prevent and treat these conditions.
Inherited metabolic disorders
Caused by gene changes, these disorders affect the body's ability to change food into energy. They also affect how energy is used, such as for cell repair.
Intravenous pyelogram
An intravenous pyelogram is an imaging exam that may be used to help diagnose urinary tract disorders. Learn what to expect during the exam.
Iron deficiency in children: Prevention tips for parents
Learn how much of this key mineral your child needs and what the health risks of not getting enough are.
Is a home sperm test useful?
Using a home sperm test to check your fertility may not provide a clear answer.
Klinefelter syndrome
This genetic disorder occurs when a male is born with an extra copy of the X chromosome and may result in low testosterone production and infertility.
Klippel-Trenaunay syndrome
Main signs of this congenital disorder involve a red birthmark (port-wine stain), vein malformations, and overgrowth of tissues and bones.
Language development: Speech milestones for babies
Get the facts about baby speech and language development.
Latent autoimmune diabetes in adults (LADA): What is it?
Latent autoimmune diabetes in adults (LADA) is a slow-developing form of diabetes.
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