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Article
Overrepresentation of Multiple Birth Pregnancies in Young Infants with Four Metabolic Bone Disorders: Further Evidence that Fetal Bone Loading is a Critical Determinant of Fetal and Young Infant Bone Strength
Osteoporosis International
  • Marvin E. Miller, Wright State University
  • T. Ward
  • Adrienne Stolfi, Wright State University
  • D. Ayoub
Document Type
Article
Publication Date
7-1-2014
Abstract

Summary

The frequency of multiple birth pregnancies, mostly twin pregnancies, was overrepresented in four different groups of young infants with fractures and bone abnormalities. This finding suggests that fetal bone loading through fetal movement is an important determinant of fetal bone formation and its resultant bone strength. Introduction

It has been suggested that intrauterine confinement related to the multiple birth pregnancy (MBP) may lead to an increased risk for fragility fractures in young infants as a result of decreased fetal bone loading. Methods

To objectively test this idea, the frequency of MBPs was evaluated in five groups of young infants with bone disorders: (1) infants exposed to prolonged in utero exposure to magnesium, (2) infants with dietary copper deficiency, (3) infants with rickets from vitamin D deficiency, (4) infants with temporary brittle bone disease, and (5) infants with multiple unexplained fractures in which child abuse was the most likely diagnosis. Results

Compared to a control group and controlled for preterm birth, there was a statistically greater frequency of MBPs in each group. Conclusions

The results of this study suggest the following: (a) The overrepresentation of MBPs (95 % twins) in these five groups indicates that fetal bone loading is a critical determinant of fetal bone strength; (b) fetal and young infant bone strength is a multifactorial characteristic; and (c) infants from MBPs are at increased risk for fragility fractures during the first 12 months of life, and thus may be mistakenly diagnosed as victims of child abuse.

DOI
10.1007/s00198-014-2690-9
Citation Information
Marvin E. Miller, T. Ward, Adrienne Stolfi and D. Ayoub. "Overrepresentation of Multiple Birth Pregnancies in Young Infants with Four Metabolic Bone Disorders: Further Evidence that Fetal Bone Loading is a Critical Determinant of Fetal and Young Infant Bone Strength" Osteoporosis International Vol. 25 Iss. 7 (2014) p. 1861 - 1873 ISSN: 0937941X
Available at: http://works.bepress.com/marvin_miller/81/