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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
There are approximately 3 million unintended pregnancies in the United States each year.
Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.