By definition, at least 10% of all newborns will be labeled<unk> . Not all newborns that are<unk>  are pathologically growth restricted and, in fact, may be constitutionally<unk> . However, the designation has prognostic importance because it predicts susceptibility to hypoglycemia, hypothermia, and polycythemia. If<unk>  babies have been the subject of intrauterine growth restriction, formerly known as intrauterine growth retardation, the term "SGA associated with intrauterine growth restriction" is used. Intrauterine growth restriction refers to a condition in which a fetus is unable to achieve its genetically determined potential size. This functional definition seeks to identify a population of fetuses at risk for modifiable but otherwise poor outcomes. This definition intentionally excludes fetuses that are<unk>  <unk>  but are not pathologically<unk> . Infants born<unk>  with severe short stature (or severe<unk>  are defined as having a length less than 2.5 standard deviation scores below the mean. 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<unk> <unk>  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. Normal Weight at term delivery is 2500 g - 4200 g.<unk>  is not a synonym of low birth weight, very low birth weight, or extremely low birth weight. Example: 35-week<unk> <unk>  delivery, 2250 g weight is appropriate for<unk> <unk>  but is still low birth weight. One third of low-birth-weight neonates - infants weighing less than 2500 g - are<unk> . There is an 8.1% incidence of low birth weight in developed countries, and 6–30% in developing countries. Much of this can be attributed to the health of the mother during pregnancy. One third of babies born with a low birth weight are also<unk> . Infants that are born at low birth weights are at risk of developing neonatal infection. Both low and high maternal serum Vitamin D (25-OH) are associated with higher incidence<unk>  in white women, although the correlation does not seem to hold for African American women. +Mean Weight for<unk> <unk>  at birth with Standard Deviation and 10th percentile calculated by Z-score<unk> <unk>  at birth (weeks) Mean weight (grams) SD 10th% 22 467 92 354 23 553 109 416 24 626 129 473 25 714 156 529 26 819 186 597 27 935 215 677 28 1073 242 770 29 1211 269 882 30 1396 309 1018 31 1588 336 1166 32 1800 371 1335 33 2033 405 1538 34 2296 428 1772 35 2560 440 2021 36 2799 441 2261 37 3028 456 2477 38 3209 432 2665 39 3333 419 2810 40 3417 416 2904 41 3486 422 2958 42 3512 429 2985 43 3550 444 2981 44 3505 503 2952
Small for gestational age
Growth hormone deficiency
Large for gestational age
Low Birth Weight
Neonatal hypocalcemia
Breech birth
Vanishing twin
Low birth weight