Fitness basics
Learning Center
Holter monitor
This wearable device keeps track of the heart's rhythm during daily activities. Learn when you might need one and what to expect.
Hormonal IUD (Mirena)
This birth control device gives long-acting protection that can be reversed.
Hormone therapy for prostate cancer
Find out what to expect during testosterone-blocking therapy. Learn about choices, including medicines and surgery.
Hyperbaric oxygen therapy
This type of therapy is a well-known treatment for decompression sickness, but it has many surprising uses. Find out about why and how oxygen can heal the body.
Intraoperative magnetic resonance imaging (iMRI)
Find out how neurosurgeons use intraoperative magnetic resonance imaging (iMRI) during brain surgery.
Intrauterine insemination (IUI)
Learn more about how this infertility treatment is done and what to expect.
Knee replacement
Knee replacement surgery can relieve pain and restore function to a knee joint that's severely damaged, usually by arthritis.
Labor induction
Know what to expect during this procedure to start labor before it begins on its own.
Laryngotracheal reconstruction
Laryngotracheal reconstruction surgery — Comprehensive overview covers why it's done and what's involved with the procedure.
Laser resurfacing
Explore your options and learn what to expect from this treatment to improve the appearance of your facial skin.
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