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Transverse cerebellar diameter and transverse cerebellar diameter/ abdominal circumference index for assessing fetal growth. 1996

G Dilmen, and M F Toppare, and N O Turhan, and M Oztürk, and S Işik
Department of Radiology, Turkish Health and Therapy Foundation Medical Center, Ankara, Turkey.

In a prospective study of 330 pregnant women, measurements of the transverse cerebellar diameter (TCD), abdominal circumference (AC), biparietal diameter (BPD), head circumference (HC) and TCD/AC ratio and HC/AC ratio were obtained using conventional ultrasonography between 16th and 41st weeks of gestation. Measurement of BPD yielded a strong correlation with gestational age (r = 0.9880 and R2 = 0.9761) by cubic regression analysis. The measurement of TCD also had a very close relation with gestational age (r = 0.9767 and R2 = 0.9539). The ratio between TCD and AC was calculated and found to be 0.1436 +/- 0.0106 (SD) which remained fairly constant throughout pregnancy, while the BPD/AC ratio declined. The 5th and 95th percentiles for this ratio were 0.1279 and 0.1603. Ten of eleven fetuses with TCD/AC ratios exceeding 2 SD (0.1648) were found to have asymmetrical intrauterine growth retardation upon neonatal examination. It is demonstrated that both BPD and TCD measurements are reliable techniques that correlate well with gestational age, and the TCD/AC ratio is valuable in identifying babies with asymmetrical intrauterine growth retardation.

UI MeSH Term Description Entries
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D002531 Cerebellum The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills. Cerebella,Corpus Cerebelli,Parencephalon,Cerebellums,Parencephalons
D005260 Female Females
D005314 Embryonic and Fetal Development Morphological and physiological development of EMBRYOS or FETUSES. Embryo and Fetal Development,Prenatal Programming,Programming, Prenatal
D005317 Fetal Growth Retardation Failure of a FETUS to attain expected GROWTH. Growth Retardation, Intrauterine,Intrauterine Growth Retardation,Fetal Growth Restriction,Intrauterine Growth Restriction
D005333 Fetus The unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. In humans, the unborn young from the end of the eighth week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN. Fetal Structures,Fetal Tissue,Fetuses,Mummified Fetus,Retained Fetus,Fetal Structure,Fetal Tissues,Fetus, Mummified,Fetus, Retained,Structure, Fetal,Structures, Fetal,Tissue, Fetal,Tissues, Fetal
D005865 Gestational Age The age of the conceptus, beginning from the time of FERTILIZATION. In clinical obstetrics, the gestational age is often estimated from the onset of the last MENSTRUATION which is about 2 weeks before OVULATION and fertilization. It is also estimated to begin from fertilization, estrus, coitus, or artificial insemination. Embryologic Age,Fetal Maturity, Chronologic,Chronologic Fetal Maturity,Fetal Age,Maturity, Chronologic Fetal,Age, Embryologic,Age, Fetal,Age, Gestational,Ages, Embryologic,Ages, Fetal,Ages, Gestational,Embryologic Ages,Fetal Ages,Gestational Ages
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000005 Abdomen That portion of the body that lies between the THORAX and the PELVIS. Abdomens
D012189 Retrospective Studies Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons. Retrospective Study,Studies, Retrospective,Study, Retrospective

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