Healthy pregnancy
Learning Center
X-ray during pregnancy: Is it safe?
Learn when an X-ray during pregnancy might cause harm and how to avoid it.
X-linked agammaglobulinemia
This genetic disease weakens the immune system, mainly in males, and leads to having infections often.
Working during pregnancy: Do's and don'ts
Working during pregnancy? Here's how to have a healthy, productive nine months on the job.
Wolff-Parkinson-White (WPW) syndrome
This heart condition present at birth causes a fast heartbeat. Rarely, it can cause sudden cardiac death. Know the symptoms and how it's treated.
Whooping cough
Learn more about the symptoms, causes, treatment of this highly contagious, vaccine-preventable lung infection.
What is the Asian longhorned tick and where is it found?
Learn about this tick from Asia that was recently reported in the United States and find out how to prevent tick bites.
Video: Baby's soft spots (fontanels)
A baby's soft spots (fontanels) close when the skull bones fuse together. See how.
Vesicoureteral reflux
Learn about what happens if urine flows backward from the bladder. Usually found in children, this condition boosts the risk of urinary tract infections.
Ventricular septal defect (VSD)
In this heart problem present at birth, there is a hole between the two lower heart chambers. Know the symptoms and when surgery is needed.
Ventricular fibrillation
Without fast treatment, this heart rhythm problem can cause death within minutes. Learn the symptoms of VFib and what actions to take to save a life.
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