Literature

References and Literature can be found here about:

• Gestational Age Calculator
• Growth Charts
• Estimating Fetal Weight
• Centile Calculator

Gestation Calculator

References

• Robinson HP, Fleming JEE. A critical evaluation of sonar 'crown-rump length' measurements. Br J Obstet Gynaecol 1975, 82:702-10
• Mul T, Mongelli M, Gardosi J A comparative analysis of second trimester ultrasound dating formulae in pregnancies conceived with artificial reproductive techniques. Ultrasound Obstet Gynecol, 1996;8:397-402
• Altman DG, Chitty LS. New charts for ultrasound dating of pregnancy. Ultrasound Obstet Gynecol 1997;10:174-91

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Growth Charts

Summary of the evidence and referenced articles on individually adjustable standards, click here (Adobe Acrobat file)

RCOG Green Top Guideline Number 31: The Investigation and Management of the Small-for-gestational-age fetus. Click here to view

Differentiation between normal and abnormal fetal growth, click here

Detailed information including its background, concepts, coefficients and detailed references, click here

For a summary of the evidence, and referenced articles on customised charts and adjustable standards (2005), click here

For a brief review of the "Differentiation between normal and abnormal fetal growth" (2002), click here

"Audit of fundal height measurement plotted on customised growth charts", published in MIDIRS, September 2006 pages 341-345.

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Estimating Fetal Weight

The calculator is based on Campbell's (A) formula [1] and Hadlock's (H, A and F) formula [2],
where: A = Abdominal circumference; F = Femur length; H = Head circumference

References  

• Campbell S, Wilkin D. Ultrasonic measurement of fetal abdomen circumference in the estimation of fetal weight. Br J Obstet Gynecol 1975; 82:689-697
• Hadlock FP, Harris RB, Sharman RS, Deter RL, Park SK. Estimation of fetal weight with the use of head, body and femur measurements - a prospective study. Am J Obstet Gynecol 1985; 151:333-337.

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Centile Calculator

NB: Centile adjustment for maternal stature is truncated to BMI limits of 19.96 - 29.90

For more detailed information about the software including its background, concepts, references and method of use, click here

References

• Gardosi J, Chang A, Kalyan B, Sahota D, Symonds EM. Customised antenatal growth charts.
  Lancet 1992;339:283-7
• Gardosi J, Mongelli M, Wilcox M, Chang A. An adjustable fetal weight standard.
  Ultrasound Obstet Gynecol 1995;6: 168 - 74

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