Stress basics
Learning Center
Tonic-clonic (grand mal) seizure
Learn about this type of seizure that can cause convulsions. Also know how to help if you see someone having one.
Overdue pregnancy: What to do when baby's overdue
Past your due date? Understand why a pregnancy might be overdue and what's next.
Video: HSG test for female infertility
Video animation shows the HSG test — an X-ray study to identify causes of female infertility.
Puberty blockers for transgender and gender-diverse youth
Understand how puberty blockers work to suppress puberty. Learn about their benefits, side effects and long-term effects.
Lack of sleep: Can it make you sick?
Lack of sleep can affect your immune system. Here's what you need to know.
What is thirdhand smoke, and why is it a concern?
Tobacco smoke creates toxic residue that clings to walls, carpets, clothes and other surfaces.
Tinnitus causes: Could my antidepressant be the culprit?
Ringing in the ears, also known as tinnitus, has many possible causes, such as taking antidepressants.
Stress and hair loss: Are they related?
Learn how stress and hair loss can be related.
Rheumatoid arthritis: Can it affect the eyes?
Although rheumatoid arthritis is primarily a joint disease, it occasionally affects the eyes.
Triple X syndrome
Females with this genetic disorder have three X chromosomes instead of two. Symptoms can be mild or include developmental delays and learning disabilities.
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