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Multilingual Demographic Dictionary, second unified edition, English volume
Premature delivery
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Full term deliveries 1 occur when the pregnancy has lasted at least 37 weeks, measured in conventional duration of pregnancy (603-3*). A pregnancy ending before the normal period is termed a premature delivery 2 or premature confinement 2 or premature birth 2 and the product of this delivery is called a premature baby 4. Births which are not premature are called births at term 3 or full-term births 3. The word prematurity 5 is used to refer to phenomena connected with premature delivery. A classification of births by stage of development that does not depend upon an estimate of the period of gestation is used in many countries. In this classification a live-born infant with a birth weight 6 of 2,500 grams (5 1/2 lbs.) or less is said to be immature 8. Immaturity 7 is often combined with debility 9, an abnormal state of weakness. More...