Related Experiment Videos
Analysis of lower birth weight in infants with congenital limb deficiency
A E Czeizel1, C Elek, K Ivicsics
1Department of Human Genetics and Teratology, World Health Organization Collaborating Centre for the Community Control of Hereditary Diseases, Budapest, Hungary.
Insights
Infants with congenital limb deficiency often have lower birth weights. Terminal transverse deficiencies are linked to intrauterine growth retardation, while amniogenic defects correlate with higher preterm birth rates.
Area of Science:
- Pediatrics
- Genetics
- Developmental Biology
Background:
- Congenital limb deficiency (CLD) encompasses a spectrum of developmental abnormalities affecting limb formation.
- Understanding the etiological factors and associated conditions of CLD is crucial for early diagnosis and intervention.
- Previous research indicates potential links between CLD and various perinatal factors, but specific associations require further elucidation.
Purpose of the Study:
- To investigate the relationship between different types of isolated congenital limb deficiency and birth weight.
- To identify specific CLD subtypes associated with increased risk of preterm birth.
- To explore the underlying causes of low birth weight in infants with CLD, differentiating between intrauterine growth retardation and other factors.
Main Methods:
- A population-based case-control study utilizing a validated Hungarian dataset.
- Inclusion of 537 cases of isolated congenital limb deficiency, categorized into distinct groups.
- Statistical analysis, including adjusted odds ratios, to assess associations between CLD types and birth outcomes.
Main Results:
- All investigated CLD groups exhibited significantly lower birth weights compared to controls.
- Infants with terminal transverse deficiencies showed a significantly lower mean birth weight.
- A significantly higher rate of preterm birth was observed in infants with amniogenic defects, associated with the early amnion rupture sequence.
- Intrauterine growth retardation was identified as the primary contributor to lower birth weight in the terminal transverse deficiency group.
Conclusions:
- Congenital limb deficiency is consistently associated with reduced birth weight across various subtypes.
- Terminal transverse deficiencies are strongly linked to intrauterine growth retardation, suggesting developmental origins.
- Amniogenic defects represent a distinct pathway within CLD, associated with an elevated risk of preterm birth.
- The etiology of low birth weight in CLD appears multifactorial, with specific mechanisms varying by deficiency type.
Abstract:
A case-control study on different groups of isolated congenital limb deficiency was performed using a population-based and validated Hungarian data set of 537 cases. All groups showed a significantly lower birth weight. The adjusted odds ratio indicated a significantly lower mean birth weight in infants with terminal transverse deficiencies and a significantly higher rate of preterm birth in those with amniogenic defects (part of the early amnion rupture sequence). The different analyses showed that the lower birth weight in the terminal transverse group was caused mainly by intrauterine growth retardation. Lack of limb parts appears to be of secondary importance, especially in the upper limb.