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Optimal fetal growth: a misconception?

Mark Hanson1, Torvid Kiserud2, Gerard H A Visser3

  • 1Institute of Developmental Sciences and National Institute for Health Research Nutrition Biomedical Research Centre, University of Southampton and University Hospital Southampton, Southampton, United Kingdom.

American Journal of Obstetrics and Gynecology
|June 17, 2015
PubMed
Summary
This summary is machine-generated.

Fetal growth adapts to challenges like poor nutrition, but a universal standard overlooks normal variations. This could lead to medical errors and ethical concerns regarding fetal development.

Keywords:
fetal growth trajectoryinadequate nutritionlow birthweight

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Area of Science:

  • Developmental biology
  • Maternal-fetal medicine
  • Nutritional science

Background:

  • Fetal growth trajectory alterations are adaptive responses to developmental challenges, such as nutritional inadequacy.
  • Despite nutritional shifts, mean birthweight shows minimal change, yet low birthweight is a risk factor for noncommunicable diseases.
  • Numerous parental and environmental factors influence fetal growth, representing normal variations rather than abnormalities.

Purpose of the Study:

  • To critically evaluate the concept of a universal standard for optimal fetal growth.
  • To highlight the potential adverse impacts of a standardized approach on clinical practice and ethical considerations.

Main Methods:

  • Review of existing literature on fetal growth, adaptation, and influencing factors.
  • Analysis of the implications of establishing a universal fetal growth standard.
  • Discussion of ethical and practical challenges associated with standardized growth assessment.

Main Results:

  • Fetal growth variations are normal adaptive responses, not necessarily pathological.
  • A universal standard for fetal growth may misinterpret normal variations, leading to clinical misjudgments.
  • Potential for adverse clinical outcomes, including incorrect gestational age estimation and unnecessary interventions.

Conclusions:

  • Establishing a universal standard for optimal fetal growth is scientifically questionable and potentially harmful.
  • Clinical practice should acknowledge the wide spectrum of normal fetal growth responses.
  • Ethical and practical concerns necessitate a nuanced approach to fetal growth assessment, avoiding rigid standardization.