Preterm (premature) birth occurs in about 11 to 13 percent of pregnancies in the US. Almost 60 percent of twins, triplets, and other multiple deliveries result in preterm births.

A birth is considered "preterm" when a child is born before 37 weeks of pregnancy have been completed. Other categories of preterm birth include late preterm (34–36 weeks), moderately preterm (32–36 weeks), and very preterm (less than 32 weeks).

The following is information for parents of preterm babies – what to expect after birth at the hospital.

If your baby is born preterm, she may neither look nor behave like a full-term infant. While the average full-term baby weighs about 7 pounds (3.17 kg) at birth, a preterm newborn might weigh 5 pounds (2.26 kg) or even considerably less. The earlier your baby arrives, the smaller she will be, the larger her head will seem in relation to the rest of...

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