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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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FAQ173
What is early preterm birth?
Most pregnancies last about 40 weeks. Babies born between 32 and 37 weeks of pregnancy are considered preterm. Babies born before 32 weeks are called "early preterm."
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August 2011
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3.
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FAQ087
What is preterm labor?
The length of a pregnancy is 40 weeks. In most pregnancies, labor starts between 37 weeks and 42 weeks after a woman's last menstrual period. When it begins before 37 weeks, it...
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May 2011
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