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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Gas exchange occurs at the alveolar capillary membrane. Gas exchange occurs at the alveolar capillary membrane.
Dietart history for older adults Dietart history for older adults
Sample Exercise Program for Limited Older Adults (cont.) Sample Exercise Program for Limited Older Adults (cont.)
In the past year, about one in five adults in the United States reported symptoms of anxiety ... In the past year, about one in five adults in the United States reported symptoms of anxiety ...
The proportion of U.S. adults in the workforce has increased slightly for older age groups over the ... The proportion of U.S. adults in the workforce has increased slightly for older age groups over the ...
Postreplication repair occurs if DNA replication Postreplication repair occurs if DNA replication
Video: The Hypothalamus: The Body's Thermostat (Human Thermostat)

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