Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Identify the structures shown below by filling in the blanks.
South Vietnamese women and children were among some 300 apparently unarmed civilians killed in a ...