Stress basics
Learning Center
Stress and hair loss: Are they related?
Learn how stress and hair loss can be related.
Stages of labor and birth: Baby, it's time!
Find out what happens during the different stages of labor and birth.
Spitting up in babies: What's normal, what's not
Spitting up in babies is common — and usually nothing to worry about.
Spina bifida
Learn about this condition in which an unborn baby's spine and spinal cord don't form properly. Surgery during pregnancy may be a treatment option.
Spermicide
Learn how to use this type of birth control that prevents pregnancy by killing or immobilizing sperm so that the sperm can't fertilize an egg.
Sperm: How long do they live after ejaculation?
After ejaculation, the life span of sperm depends on the circumstances.
Small bowel prolapse (enterocele)
Learn more about this condition also called a vaginal hernia that happens when the small bowel pushes down onto the top of the vagina.
Slide show: Vaginal tears in childbirth
Vaginal tears during childbirth are common. See illustrations of various degrees of vaginal tears and treatment tips.
Slide show: Pregnancy stretches
Know how to relieve aches and pains as your pregnancy progresses.
Slide show: Labor positions
Consider positions that might help you relax and ease pain during labor.
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