Transverse cerebellar diameter/abdominal circumference ratio throughout pregnancy: a gestational age-independent method to assess fetal growth.
In a prospective study of 162 patients, measurements of the transverse cerebellar diameter (TCD) and abdominal circumference (AC) were obtained between 15-38 weeks' gestation. A ratio between the TCD and AC was calculated after each examination. This ratio remained constant during gestation. The mean ratio was 13.7% (fifth and 95th percentiles of 11.9 and 15.9%, respectively); the median ratio was 13.6%. Forty-two patients had repeat measurements and the ratio did not change. This ratio is gestational age-independent; however, further investigation is needed to determine its application in the assessment of fetal growth abnormalities.
Campbell
W A
WA
Department of Obstetrics and Gynecology, University of Connecticut Health Center-John Dempsey Hospital, Farmington, Connecticut.
Nardi
D
D
Vintzileos
A M
AM
Rodis
J F
JF
Turner
G W
GW
Egan
J F
JF
D000005:Abdomen / Q000254:growth & development; D000886:Anthropometry; D002531:Cerebellum / Q000254:growth & development; D003430:Cross-Sectional Studies; D005314:Embryonic and Fetal Development; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011446:Prospective Studies