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Birth weight is the body weight of a baby at their birth. [1] The average birth weight in babies of European and African descent is 3.5 kilograms (7.7 lb), with the normative range between 2.5 and 4.0 kilograms (5.5 and 8.8 lb). [2] On average, babies of Asian descent weigh about 3.25 kilograms (7.2 lb). [3] [4] The prevalence of low birth ...
A related term is low birth weight, defined as an infant with a birth weight (that is, mass at the time of birth) of less than 2500 g (5 lb 8 oz), regardless of gestational age at the time of birth. Other related terms include "very low birth weight", which is less than 1500 g, and "extremely low birth weight", which is less than 1000 g.
Large for gestational age ( LGA) is a term used to describe infants that are born with an abnormally high weight, specifically in the 90th percentile or above, compared to other babies of the same developmental age. [ 1][ 2][ 3] Macrosomia is a similar term that describes excessive birth weight, but refers to an absolute measurement, regardless ...
Fetal viability is the ability of a human fetus to survive outside the uterus. Viability depends upon factors such as birth weight, gestational age, and the availability of advanced medical care. In low-income countries, more than 90% of extremely preterm newborns (less than 28 weeks gestational age) die due to a lack of said medical care; in ...
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Low birth weight may be a result of preterm birth. Low birth weight ( LBW) is defined by the World Health Organization as a birth weight of an infant of 2,499 g (5 lb 8.1 oz) or less, regardless of gestational age. [1] Infants born with LBW have added health risks which require close management, often in a neonatal intensive care unit (NICU).
A further group including 39 fetuses weighing between 100 and 300 grams showed a fetal thymic weight between 136 mg/100 gram to 77 mg/ 100 gram. In fetuses up to 28 weeks, it was observed by scientists that the fetal thymic weight was the highest and was in contrast to many other organs like brain, liver which constitute more or less constant ...
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] Extreme preterm [2] is less than 28 weeks, very early preterm birth is between 28 and 32 weeks, early preterm birth occurs between 32 and 34 weeks, late ...