Fitness basics
Learning Center
Female fertility: Why lifestyle choices count
Know what you can do to protect being able to get pregnant.
COVID-19, cold, allergies and the flu: What are the differences?
Knowing if you have COVID-19, a cold, the flu or seasonal allergies isn't easy. Find out about the differences between these illnesses.
Herd immunity and COVID-19: What you need to know
To protect groups of people over time, it helps to know what level of recovery or vaccination in a population makes it hard for a germ to spread.
Placenta: How it works, what's normal
Understand how this pregnancy organ works and what conditions can affect it.
Pregnancy and obesity: Know the risks
Know how obesity can affect your pregnancy. Learn about possible complications and specialized care you might need.
Erectile dysfunction: Viagra and other oral medications
Get the facts on medicines that are taken by mouth for ED.
How to tell if a loved one is abusing opioids
Anyone using opioids is at risk of misusing these medicines. Don't ignore signs of harmful or illegal use. Taking action could save a loved one's life.
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