Individual correction of birth weight for parental stature with special reference to small-for-date and large-for-date infants

Lazar, Philippe; Dreyfus, Jean‐Claude; Papiernik-Berkhauer, E

doi:10.1515/jpme.1975.3.4.242

Cited by 10 publications

(5 citation statements)

References 5 publications

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“…In 1975, Lazar et al [28] indicated that because of the strong statistical correlation between paternal and maternal height, the paternal height did not make any important contribution to birth weight. More recently, Wilcox et al [34] also observed the correlation between paternal and maternal height, but conclude that paternal height should be taken into account when defining IUGR.…”

Section: Discussionmentioning

confidence: 99%

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Definition of Fetal Growth Restriction According to Constitutional Growth Potential

2001

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Identification of newborn babies with fetal growth restriction remains a problem both from the multi-factorial aspect of fetal growth and from statistical definition. Besides the usual terms: ‘Small for gestational age’ (SGA) and intrauterine growth retardation (IUGR), often used synonymously, the term ‘fetal growth retardation’ was recently introduced in reference to the genetic growth potential of infants. From a sample of 72,000 births, we have designed a statistical model in order to estimate the expected birth weight taking into account gestational age, sex, birth rank, maternal age, height and pregravid weight, we then calculated an individual limit of birth weight under that a newborn must be considered as having a ‘fetal growth restriction’ quoted FwGR. This new approach allowed us to identify 2 groups of newborns with FGR, one classically identified as SGA (noted FwGR_I) (3.9%), and the other newly identified as FGR (noted FwGR_II) (1.4%). In contrast, this approach allowed us to identify a group of ‘constitutionally small’ infants according to their constitutional growth potential (1.1%). In other words, among infants usually defined as SGA (5%), 22% appeared in fact to be ‘constitutionally small’ and therefore misclassified. As an initial validation, we observed that the proportion of maternal hypertension during pregnancy was low in the ‘constitutionally small’ infants (close to that of the normal group), and three times higher in the newly identified group FwGR_II than in the normal group. Following these results, it seems to be meaningful to follow-up this new group of FwGR_II infants, in terms of catch-up growth and neurodevelopmental outcome.

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Section: Discussionmentioning

confidence: 99%

“…Adjustment for height or pre-pregnancy weight is rather rare in the literature. As a precursor, in 1975, Lazar et al [28] proposed a correction of birth weight of 10 g for a variation of maternal weight of 1 kg, i.e. 400 g for 40 kg.…”

Section: Introductionmentioning

confidence: 99%

Definition of Fetal Growth Restriction According to Constitutional Growth Potential

2001

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“…Paternal height, which might also be considered as a constitutional determinant of birth weight and birth length, was not available in our database. However, Lazar et al indicated that, because of the strong statistical correlation between paternal and maternal height, paternal height did not further contribute to birth weight [14]. We used a backwards stepwise multiple regression analysis for calculating a predicted birth weight according to "physiological birth weight determinants" in the same way as Sanderson [20].…”

Section: Commentmentioning

confidence: 99%

Identification of newborns with Fetal Growth Restriction (FGR) in weight and/or length based on constitutional growth potential

et al. 2006

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This study was carried out to build statistical models for defining FGR (Fetal Growth Restriction) in weight and/or length after taking growth potential of an infant into account. From a cohort of pregnant women having given birth to 47,733 infants in 141 French maternity units, two statistical models gave individualized limits of birth weight and birth length (based on the 5th centile) below which, after adjustment for its individual growth potential, a newborn must be considered as FGR in weight and/or in length. A sample of 906 infants had measures taken of cord blood growth factors (IGF1, IGFBP3). The FGR(W) definition (weight<5th centile for growth potential) permitted the identification of infants who presented rates of maternal hypertension (13.6%) and of Apgar score at 5 min<6 (2.9%) higher than in the classical group SGA(W) (weight<5th centile for sex and gestational age) (9.6% and 2.2% respectively). By combining FGR(W) and SGA(W), a subgroup of infants, not currently recognized as SGA, presented very high rates of maternal hypertension (19.9%) and of low Apgar score (3.9%). Conversely a subgroup of infants, currently recognized as SGA(W), had rates as low as in the normal infants group, and had to be considered as "constitutionally small" (that is to say 24% of the SGA(W)). Combining FGR(W) and FGR(L) (length<5th centile of growth potential), 7.6% of infants appeared growth-restricted, and 1.8% appeared constitutionally small in weight and/or in length. The FGR(W)-FGR(L) infants showed the lowest mean values of IGF1 (126.2+/-3.2) and IGFBP3 (0.86+/-0.03). These new definitions of FGR(W) and FGR(L) could help to better identify infants at birth requiring neonatal care, and monitoring of growth catch-up and neurodevelopmental outcome.

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“…The relationship between height and pregnancy outcome is confounded by the fact that maternal height reflects environmental, early nutritional, and genetic influences. The influence of height is also confounded because, although height appears to have an independent effect on birth weight (18,23,24), evidence from industrialized countries suggests that prepregnancy weight or pregnancy weight gain have a larger effect on birth weight than does height (18,23). The interaction of these effects is discussed in the next section.…”

Section: Nutrition In Preparation For Reproductionmentioning

confidence: 99%

Maternal and Infant Nutrition in Developing Countries, with Special Reference to Possible Intervention Programmes in the Context of Health

1984

Food Nutr Bull

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Individual correction of birth weight for parental stature with special reference to small-for-date and large-for-date infants

Cited by 10 publications

References 5 publications

Definition of Fetal Growth Restriction According to Constitutional Growth Potential

Definition of Fetal Growth Restriction According to Constitutional Growth Potential

Identification of newborns with Fetal Growth Restriction (FGR) in weight and/or length based on constitutional growth potential

Maternal and Infant Nutrition in Developing Countries, with Special Reference to Possible Intervention Programmes in the Context of Health

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