Fertility
Learning Center
Vitamin D deficiency: Can it cause high blood pressure?
Too little vitamin D is bad for the bones, but what about the heart? Learn how a low vitamin D level may affect blood pressure.
Asthma medications: Know your options
Learn more about the different categories of medications to help you control asthma symptoms.
Polypill: Does it treat heart disease?
This combination pill contains small doses of several commonly prescribed heart disease medicines.
Fecal incontinence
Learn about this common issue that causes some people to avoid social situations. Treatments are available.
Bacterial vs. viral infections: How do they differ?
Understand the differences between bacterial and viral infections.
Bone scan
This diagnostic test can be used to check for cancer that has spread to the bones, skeletal pain that can't be explained, bone infection or a bone injury.
Sperm: How long do they live after ejaculation?
After ejaculation, the life span of sperm depends on the circumstances.
COVID-19: Who's at higher risk of serious symptoms?
Advanced age and some health conditions can raise the risk of serious COVID-19 (coronavirus disease 2019) illness.
Different types of COVID-19 vaccines: How they work
Find out how different COVID-19 vaccines cause your body to create antibodies that will fight the COVID-19 virus.
Video: How to use a dry powder tube inhaler
Watch these step-by-step instructions for using a dry powder tube inhaler.
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