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1.
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FAQ092
What causes a twin pregnancy?
Having twins runs in some families. The most important factor, however, is age. Women older than 30 years are more likely to have twins than are younger women. One reas...
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June 2012
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2.
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FAQ032
How long does pregnancy last?
Pregnancy lasts about 40 weeks, which is equal to 9 months. The 9 months of pregnancy are divided into three 3-month periods called trimesters.
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August 2011
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