Newborn health
Learning Center
Video: Baby's soft spots (fontanels)
A baby's soft spots (fontanels) close when the skull bones fuse together. See how.
Video: Allergy tests
What happens in an allergy test? Watch this video and find out.
Vasectomy reversal
Learn about this microsurgery procedure that can restore your fertility after a vasectomy.
Vasectomy
Find out more about this procedure that provides nearly 100 percent effective male birth control by cutting the supply of sperm to semen.
Varicocele
Find out how this condition involving the enlargement of veins in the scrotum can affect sperm quality and production.
Urine cytology
A urine cytology test uses a sample of your urine to look for abnormal cells, which could indicate a urinary tract cancer.
Undescended testicle
Learn about causes, complications and treatment of this condition in which one or both testicles aren't in the usual place within the scrotum.
Uncircumcised penis: Is special care needed?
Know how to wash and care for your child's uncircumcised penis.
Umbilical cord care: Do's and don'ts for parents
Find out how to keep the area clean and dry, and when to call the doctor.
Tumor vs. cyst: What's the difference?
A Mayo Clinic expert explains the differences and similarities between these two types of growths and how doctors determine if they're cancerous.
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