Fitness basics
Learning Center
Hypothyroidism and infertility: Any connection?
For women, there's sometimes a link between having an underactive thyroid gland (hypothyroidism) and infertility.
Hepatitis C: How common is sexual transmission?
Although hepatitis C is highly contagious, the risk of sexual transmission is very low.
Hemorrhoids during pregnancy: What's the best treatment?
Know how to relieve painful, swollen veins in the anus and rectum during pregnancy.
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
Headaches during pregnancy: What's the best treatment?
Here's help with preventing or easing this common type of pain while you're pregnant.
Hand swelling during exercise: A concern?
This condition is a common problem, but rarely serious enough to disrupt your routine.
HER2-positive breast cancer: What is it?
HER2-positive breast cancer tends to be more aggressive than other types of breast cancer. Treatments that target HER2 are very effective.
Genital herpes: Can you get it from a toilet seat?
It is nearly impossible to get genital herpes from a toilet seat.
Fundal height: An accurate sign of fetal growth?
Understand how fundal height is measured and what it means.
Frontal fibrosing alopecia
This type of receding hairline, which primarily affects older women, is treatable. The earlier you talk with your doctor about it, the better your chance of preventing permanent baldness.