Although certain circumstances have been linked to premature birth, such as mothers who smoke, use drugs, or drink alcohol, many premature births have no foreseeable cause.
Research indicates cigarette smoking is responsible for about 30% of low birth weight babies and 14% of premature births.
Duodenal atresia, one of the causes of duodenal obstruction, affects one in 10,000 live births in the United States and is found equally among boys and girls and more often among premature births.
A new medication may help to prevent spontaneous premature births.
It accounts for an estimated 14 percent of premature births and 10 percent of infant deaths.