(HealthDay News) -- Pre-term labor occurs before the 37th week
of pregnancy. About 10 percent of babies born in the United States
are considered pre-term, the American Congress of Obstetricians and
The organization says these factors may increase the risk of
Having had pre-term labor in this or a prior pregnancy.
Using cocaine or smoking cigarettes.
Having a multiple pregnancy (twins or more).
Having had a child born with a chromosomal disorder.
Having an abnormality in the cervix or uterus.
Having abdominal surgery during pregnancy.
Having an infection during pregnancy.
Bleeding during the second or third trimester of
Being underweight, or having insufficient prenatal care.
Having a mother or grandmother who took a drug called DES
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