low birth weight


Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Encyclopedia, Wikipedia.
Related to low birth weight: very low birth weight

weight

 [wāt]
1. heaviness; the degree to which a body is drawn toward the earth by gravity. (See also Tables of Weights and Measures in the Appendix.) Abbreviated wt.
2. in statistics, the process of assigning greater importance to some observations than to others, or a mathematical factor used to apply such a process.
apothecaries' weight see apothecaries' system.
atomic weight the sum of the masses of the constituents of an atom, expressed in atomic mass units (or daltons), in SI units (i.e., kilograms), or as a dimensionless ratio derived by comparing the mass to the mass of an atom of carbon-12, which is taken as 12.000. Abbreviated At wt.
avoirdupois weight see avoirdupois system.
equivalent weight the amount of substance that combines with or displaces 8.0 g of oxygen (or 1.008 g of hydrogen), usually expressed in grams; for acid/base reactions, one equivalent donates or receives a mole of protons and the equivalent weight is the ratio of the molecular weight to the number of protons involved in the reaction. For oxidation-reduction reactions, one equivalent donates or receives a mole of electrons and the equivalent weight is the ratio of the molecular weight to the number of electrons involved in the reaction.
gram molecular weight the molecular weight of a substance expressed in grams; one gram molecular weight of a molecular substance contains one mole of molecules. See also mole1.
low birth weight (LBW) see under infant.
molecular weight the weight of a molecule of a chemical compound as compared with the weight of an atom of carbon-12; it is equal to the sum of the weights of its constituent atoms and is dimensionless. Abbreviated Mol wt or MW. Although widely used, the term is not technically correct; relative molecular mass is preferable.
very low birth weight (VLBW) see under infant.

low birth weight

Neonatology Referring to an infant weight from 1500 g to 2500 g at birth; LBW is a risk factor a sui generis for M&M in early infancy, defined as < 2500 g at birth; moderate LBW–1500-2500 g; very low birth weight infants < 1500 g account for 50% of neonatal deaths Survival 85-95% > 1250 g; 65-75% > 800 g, 2% if < 600 g. See Appropriate for gestational age, Extremely low birth weight, Intrauterine growth retardation, Prematurity, Small for gestational age.
Very low birthweight Children–outcomes
Birthweight  ≤ 750 g  > X <  ≥ 1.5 kg
Sample number  68 65 61
MPC score*  87 93 100
Mental retardation–IQ < 70 21% 8% 2%
Poor cognitive function 22% 9% 2%
Poor academic skills 27% 9% 2%
Poor gross motor function  27% 9% 0%
Poor adaptive function  25% 14% 2%
Cerebral palsy 9% 6% 0%
Severe visual disability 25% 5% 2%
Hearing disability  24% 13% 3%
< Normal Wt/Ht/HS 22/25/35% 11/5/14% 0/0/2%%
*Mental Processing Composite score

low birth weight

(LBW) (lō bǐrth wāt)
Birth weight less than 2500 g. Can be due to a range of factors, including interference with intrauterine growth or premature birth.

low birth weight

Abbreviation: LBW
Abnormally low weight of a newborn, usually less than 2500 g. Its causes include: preterm delivery of less than 37 weeks, multiple gestation, an abnormal uterus or cervix, congenital (genetic) anomalies in the fetus, maternal smoking or illicit drug use, placental malformation or malfunction, inadequate maternal nutrition, or a variety of other socioeconomic problems. Early, regular prenatal care and control of chronic and acute health problems help reduce risk. A series of ultrasounds can monitor fetal development. Early delivery is necessary if the fetus does not show signs of improvement. Incomplete maturation of the newborn's lungs is the most common cause of morbidity and mortality in LBW infants. Surfactants and a variety of neonatal technological supports decrease burden of this disease. Nursing/perinatal considerations include maintaining normal body temperature; diagnosis and treatment of hypoglycemia; maintenance of fluid, electrolyte, and nutritional status; and careful monitoring of newborn intake and output. Respiratory distress may be present, requiring oxygen and ventilation. Many preterm infants also have hyperbilirubinemia and are treated with phototherapy.
See also: weight

Patient discussion about low birth weight

Q. How to loss weight like a diet with tea,pills or other kind of healthy thing.

A. drink 8 oz of warm water with 1 tablespoon of lemon... first thing in the morning

More discussions about low birth weight
References in periodicals archive ?
Very low birth weight is associated with brain structure abnormalities and cognitive function impairments: A systematic review.
Table 4 shows the association of parity with low birth weight showing the incidence of low birth weight to be maximum (26.8%) in multipara, which was found to be statistically significant.
Multivariate analysis shows that maternal age, pregnancy type, history of abortion, hemoglobin status, iron folic acid intake, and HIV status were significantly associated with term low birth weight. Also mothers less than 20 years of age delivering at the hospital were most likely to have term low birth weight, which is in agreement with studies done in Nepal [6] and India [9] but contrasts with study done in Gujarat [17].
Maternal sideropaenic anaemia was found associated with increased risk of delivery of preterm birth, low birth weight, low APGAR score at 1 minute of birth and perinatal mortality.
Prof Kotecha added: "The study reaffirms the need to tackle important factors such as maternal smoking and deprivation which are well-known to contribute to low birth weight.
"Rates of low birth weight are higher in less-advantaged socioeconomic groups and policies must be developed by the new government in Wales to reduce inequalities," added Prof Modi.
Determinants of low birth weight: methodological assessment and meta-analysis.
Every five microgram increase created an almost 20% rise in the risk of low birth weight, the researchers estimated.
Maternal exposure to ambient air pollution has been associated with a number of adverse pregnancy outcomes including low birth weight, defined as a full-term infant weighing less than 2,500 g (about 5 lb, 8 oz) at birth.
According to the World Health Organization, Low Birth Weight (LBW: defined as weight at birth of less than 2500 gram irrespective of gestational age), (1) and Very Low Birth Weight (VLBW: defined as weight equal to 1500 gram or less), have a high risk of mortality and disease during the first year of life.
Low birth weight babies are more likely to suffer from attention problems (AP) and attention-deficit/hyperactivity disorder (ADHD) than normal-weight babies.