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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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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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Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.