Insulin-like growth factor-I in cord blood is predictive of catch-up growth in monozygotic twins with discordant growth.
J Clin Endocrinol Metab
; 95(12): 5375-81, 2010 Dec.
Article
en En
| MEDLINE
| ID: mdl-20810576
ABSTRACT
OBJECTIVE:
The aim was to investigate the growth of monozygotic twins with discordant birth weights and the predictive value of birth-weight, birth-length, and cord-blood concentration of growth factors on their catch-up growth up to the age of 4 yr. PATIENTS ANDMETHODS:
Twenty-five monozygotic twin-pairs [14 with an intertwin birth-weight sd score (SDS) difference>1] were studied at birth and at 4 yr of age. In all pairs, several parameters including IGF-I were analyzed in cord blood, and in 20 pairs parameters were analyzed again at 4 yr of age. Intertwin differences (Δ) in birth weight, birth length, and growth at 3, 6, 12, 24, and 48 months were correlated with Δ of the parameters analyzed.RESULTS:
We found a reduction of Δ height SDS from birth to 4 yr, with the main catch-up occurring during the first year, but only a slight, statistically insignificant reduction of Δ body mass index SDS during the observation period. Correlation coefficients were used to identify factors predicting postnatal catch-up growth. Both birth-weight difference (r=0.653; P=0.001) and Δ IGF-I in cord blood (r=0.613; P=0.007) were of similar predictive value. Variance analysis showed no significant difference in individual impact between these two parameters, although both correlated strongly with actual height.CONCLUSION:
We observed a gradual convergence in height but not body mass index up to the age of 4 yr between genetically identical twins with discordant birth weights. Both birth-weight and cord-blood IGF-I are predictive of subsequent catch-up growth.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Gemelos Monocigóticos
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Peso al Nacer
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Factor I del Crecimiento Similar a la Insulina
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Sangre Fetal
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Crecimiento
Tipo de estudio:
Prognostic_studies
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Risk_factors_studies
Límite:
Child, preschool
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Female
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Humans
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Newborn
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Pregnancy
Idioma:
En
Revista:
J Clin Endocrinol Metab
Año:
2010
Tipo del documento:
Article
País de afiliación:
Alemania