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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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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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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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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.