• DOI:10.1111/j.1471-0528.1975.tb00710.x
Corpus ID: 31663686

A CRITICAL EVALUATION OF SONAR “CROWN‐RUMP LENGTH” MEASUREMENTS

@article{Robinson1975ACE,
  title={A CRITICAL EVALUATION OF SONAR “CROWN‐RUMP LENGTH” MEASUREMENTS},
  author={H. Robinson and J. Fleming},
  journal={BJOG: An International Journal of Obstetrics \& Gynaecology},
  year={1975},
  volume={82}
}

• H. Robinson, J. Fleming
• Published 1975
• Medicine
• BJOG: An International Journal of Obstetrics & Gynaecology

In a study to evaluate the reproducibility and accuracy of the sonar technique of measurement of the in vivo fetal crown‐rump length (Robinson, 1973), a series of in vivo and in vitro experiments was performed in which the random and systematic errors inherent in the technique were assessed. The potential sources of random error were those of operator judgement, movement of the fetus and mother, machine sensitivity settings and measurement from the photograph; while the sources of systematic… Expand

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