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Published on: June 29, 2013
Effects of the intrauterine environment on childhood growth
1UMDNJ--Robert Wood Johnson Medical School, Division of Pediatric Gastroenterology and Nutrition, New Brunswick 08903, USA.
Insights
The intrauterine environment significantly impacts childhood growth. Factors like malnutrition and hyperglycemia in utero can lead to later obesity and insulin intolerance, with interventions showing limited success.
Area of Science:
- Developmental Biology
- Pediatric Endocrinology
- Public Health
Background:
- The intrauterine environment is crucial for healthy childhood development.
- Maternal factors such as malnutrition, hyperglycemia, smoking, alcohol, and cocaine exposure can negatively impact fetal growth and long-term health.
- Intrauterine growth retardation (IUGR) is associated with significant deficits in childhood growth.
Purpose of the Study:
- To review the profound effects of the intrauterine environment on childhood growth.
- To explore the potential mechanisms linking prenatal exposures to later-life health outcomes.
- To discuss the efficacy of interventions for mitigating negative intrauterine influences.
Main Methods:
- Literature review of studies examining prenatal exposures and childhood growth.
- Analysis of animal experiments suggesting developmental impacts on hypothalamus and pancreatic beta-cells.
- Examination of clinical data on children with intrauterine growth retardation and intervention outcomes.
Main Results:
- Prenatal malnutrition and hyperglycemia are linked to increased childhood obesity and insulin intolerance.
- Maternal alcohol use results in decreased head circumference, stature, and weight.
- Intrauterine growth retardation leads to persistent deficits in height and weight, with interventions like growth hormone showing limited efficacy in improving final height.
Conclusions:
- The intrauterine environment exerts lasting effects on childhood growth and metabolic health.
- Understanding these effects is critical for developing effective preventative strategies.
- Current interventions for intrauterine growth retardation have limitations, highlighting the need for further research.
Abstract:
The intrauterine environment plays a critical role in childhood growth. Infants exposed to acute malnutrition in early pregnancy are more likely to be obese in later life. Similarly, children exposed to hyperglycemia in utero are also more likely to develop insulin intolerance and obesity during childhood. The mechanisms underlying these changes are not understood. However, animal experiments suggest that severe overnutrition or undernutrition during pregnancy may affect hypothalamic development, or pancreatic beta-cell development. The effects of cigarette smoking on childhood growth can best be explained by the increased risk of intrauterine growth retardation. In contrast, alcohol ingestion during pregnancy leads to a syndromic decrease in childhood head circumference, stature, and weight. The effects of cocaine are most likely multifactorial, since cocaine ingestion tends to covary with tobacco use, alcohol use, opiate use, and low socioeconomic status. The most striking effects of the intrauterine environment on childhood growth are seen in children with intrauterine growth retardation. These children remain significantly lighter and shorter than their peers. Efforts to reverse intrauterine growth retardation have been disappointing, and at times risky. However, caloric supplementation in undernourished populations may be of significant benefit. The use of growth hormone promises to reduce some of the height deficits in children with intrauterine growth retardation. However, to date there is no evidence suggesting changes in final height in children with intrauterine growth retardation who receive growth hormone.
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