Article thumbnail
Location of Repository

The Effect Of Normocephalic Foetal Skull On Foetal Dating Using Biparietal Diameter

By AC Ugwu, IC Nwobi, AN Eteudo and KN Ovuoba


The study was conducted to determine the desirability or otherwise of mathematically correcting every normal foetal head shape to an ideal shape prior to dating using the biparietal diameter (BPD). Transabdominal Sonography was performed in 118 pregnant women in their second- and third- trimesters. The BPDs and fronto-occipital diameters (FODs) were measured. A study of 100 foetuses with normal head shapes was used to derive in this environment, a regression equation for an area corrected BPD (BPDa): BPDa = - 2. 853 + 0.483 (BPD + FOD). The BPDa of 18 foetuses with normal head shapes, were computed with this equation. Z test was performed to compare the mean BPD and Mean BPDa. Z statistic showed no significant difference (p>0.5) between BPDa and BPD in this group of foetuses with normal head shapes. There is no need to mathematically correct normocephalic foetal head shapes to ideal shapes before dating using the BPD

Topics: Online Journal of Health and Allied Sciences
Publisher: Dr. B.S. Kakkilaya
Year: 2008
OAI identifier:

Suggested articles


  1. American Institute of Ultrasound
  2. Analysis of biparietal diameter as an accurate indicator of gestational age.
  3. (1974). Dorland's illustrated medical dictionary, 25th ed.
  4. (1997). Fetal Growth In: The Foetus. Syllabus Laurel,
  5. Improved prediction of gestational age from foetal head measurements.
  6. of ultrasound in Medicine. Guidelines for the performance of the Antepartum obstetrical ultrasound examination.
  7. Roentgenological skull measurements and their diagnostic applications.
  8. Sonographic Assessment of Fetal Cephalic Index in a Nigerian population: A novel paradigm
  9. Sonographic prediction of gestational age: Accuracy of second-and third-trimester foetal measurements.
  10. The diferential enlargement of the neurocranium in the full-term fetus.

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.