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Learning Center
What is BPA? Should I be worried about it?
Find out more about BPA, a chemical used in some plastics and resins, and explore options for reducing your exposure.
Semen allergy: A cause of infertility?
Semen allergy, also called seminal plasma hypersensitivity, is a rare condition that can be easily misdiagnosed. Learn about symptoms and possible treatments.
Male hypogonadism
This condition affects the ability of men's bodies to produce enough testosterone or enough sperm or both.
Retrograde ejaculation
Learn about the symptoms and treatment options for this condition that can cause male infertility.
Erectile dysfunction: Nonoral treatments
Get the facts about shots, penis pumps and other ED treatments that don't involve taking medicine by mouth.
Mononucleosis and Epstein-Barr: What's the connection?
The Epstein-Barr virus sometimes causes a disease known as mono. Learn who is at risk and what the symptoms are.
Loss of taste and smell: Natural with aging?
Aging can play a role in the loss of taste and smell — but not always.
Migraines: Are they triggered by weather changes?
Migraines — Are they triggered by weather changes?
Genital herpes: Can you get it from a toilet seat?
It is nearly impossible to get genital herpes from a toilet seat.
Sea salt vs. table salt: What's the difference?
Should you take health claims about sea salt with a grain of salt? What makes it different from table salt?