Fitness basics
Learning Center
Retractile testicle
Find out about this condition that allows the testicle to move between the scrotum and groin.
Testosterone therapy: Potential benefits and risks as you age
Testosterone therapy — Explore the potential benefits and risks of increasing your testosterone level.
Learning disorders: Know the signs, how to help
Here's how to find out what's going on if your child often has trouble with reading, writing or other skills.
Rheumatoid arthritis: Does pregnancy affect symptoms?
Learn how pregnancy can affect rheumatoid arthritis symptoms.
Unusual COVID-19 symptoms: What are they?
COVID-19 can cause a wide variety of symptoms, some more common than others. Learn about how COVID-19 can make you feel.
Post-vasectomy pain syndrome
Learn about post-vasectomy pain syndrome (PVPS) — How it happens after a vasectomy, tests to diagnose it and treatment options.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
Vaginal bleeding
Bleeding from your vagina that's different from your period might signal a problem. Learn about possible causes and when you should see a doctor.
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