Fitness basics
Learning Center
Abnormal sperm morphology: What does it mean?
Abnormal sperm morphology may be a contributing factor in male infertility.
Ureteral obstruction
Learn about what causes blockage of the tubes that carry urine from the kidneys to the bladder, tests you might need and how the condition can be treated.
Epidermolysis bullosa
Learn about a rare inherited disease that often shows up in infancy and causes fragile, blistering skin on the palms and feet. Severe disease may be fatal.
Congenital mitral valve anomalies
These heart problems at birth cause the mitral valve to leak or become narrowed. Know the symptoms and treatment.
Osteochondritis dissecans
Osteochondritis dissecans most commonly affects children who are very active in sports. Learn about the symptoms and treatment of this joint condition.
Prescription drug abuse
Using a prescription medicine in a way not intended by the prescriber can lead to drug abuse. Learn about risk factors and treatment for drug misuse.
Enlarged breasts in men (gynecomastia)
Learn how an imbalance of the hormones estrogen and testosterone can cause breast tissue swelling in boys or men.
Bacterial vaginosis
Learn about symptoms, treatments and prevention of this common vaginal condition.
Heart valve disease
Learn about this condition in which one or more of the heart valves doesn't work properly.
Chiari malformation
Learn about this brain condition in which brain tissue extends into the spinal canal.
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