Premature baby in an incubator. Premature birth is when a baby is born before the normal end of pregnancy. In humans, a pregnancy normally lasts for about nine months. On average, a pregnancy lasts for 266 days. Babies who are born before 37 complete weeks of pregnancy (calculated from the last menstrual period) are said to be premature.

A fact from Preterm birth appeared on Wikipedia's Main Page in the Did you know? column on 24 December 2004. The text of the entry was as follows: Did you know... that Rumaisa Rahman, born prematurely in Chicago on September 19, 2004, was 8 inches (20 cm) long and weighed 8½ oz. (244 g) at birth?; A record of the entry may be seen at Wikipedia:Recent …

A. Anemia of prematurity. Apnea of prematurity. Assessment of Preterm Infants’ Behavior.

Preterm birth. Preterm birth is the birth of an infant at fewer than 37 weeks gestational age. Globally, about 15 million were born before 37 weeks of gestation. Premature birth is the leading cause of death in children under five years of age though many that survive experience disabilities including learning defects and visual and hearing ...

Preterm birth. Preterm birth, also known as premature birth, is the birth of a baby at fewer than 37 weeks gestational age, as opposed to full-term delivery at approximately 40 weeks. [1] Very early preterm birth is before 32 weeks, early preterm birth occurs between 32–36 weeks, late preterm birth is between 34–36 weeks' gestation. [8]

Late preterm infants are infants born at a gestational age between 34. +. 0⁄7 weeks and 36. +. 6⁄7 weeks. They have higher morbidity and mortality rates than term infants (gestational age ≥37 weeks) due to their relative physiologic and metabolic immaturity, even though they are often the size and weight of some term infants.