title: Relative growth of brain in the human fetuses: first gestational trimester.
abstract: The relative growth of brain weight was studied in 23 Brazilian human fixed fetuses of known age ranging from 9th to 12th weeks post-conception using the allometric method: Y = aXb. The brain weight (grams) was correlated to the fetal parameters of growth: gestational age (weeks post-conception), cephalic perimeter (millimeters) and fetal weight (grams). The brain weight growth presented negative allometry relative to fetal age (b = 0.87) and cephalic perimeter (b = 2.46) and positive allometry relative to gestational age (b = 6.65). These data are important to compare the fetal growth after ultrasonic investigation.
authors.affiliation: Department of Anatomy, State University of Rio de Janeiro (UERJ).
authors.forename: S S
authors.initials: SS
authors.lastname: Wanderley
authors.forename: M
authors.initials: M
authors.lastname: Costa-Neves
authors.forename: R de M
authors.initials: Rde M
authors.lastname: Rega
mesh_terms: D001921:Brain / Q000196:embryology* / Q000254:growth & development; D001938:Brazil; D005260:Female; D005865:Gestational Age; D006801:Humans; D008297:Male; D009929:Organ Size