A baby born before 37 weeks gestation (the time from conception to birth) is considered premature; when born before 32 weeks, a child is considered significantly premature.

term used to describe infants born before 37 weeks. Normal clinical gestation is 40 weeks (which is usually 36-38 weeks embryonic development) infants born after 42 weeks clinical gestation are called postmature. (More? Normal Development - Birth)

describes a baby born before 37 weeks of pregnancy.

(infant) - an infant born before 37 weeks gestation

born after a gestation period of less than the normal time; "a premature infant"

Not fully grown or mature. Used to describe an infant born before 37 weeks of pregnancy. Premature infants usually have low birthweights, generally under 5.5 pounds.

Any baby born at less than 37 completed weeks of pregnancy.

A live birth or fetal death occurring before the 37th week of gestation.

Infant that is born before 37 weeks gestation.

The term used to describe babies born before 37 weeks of gestation. Fewer than 10 percent of babies arrive this early.

When a baby is born 3 or more weeks earlier than the due date.

describes a baby that is born less than 37 weeks after the mother’s last menstrual period. Often shortened to “premie.

a baby born before full term or 37 weeks of gestation.