title: Prenatal growth and asymmetry of thyroid gland in the cattle (Bos primigenius f. taurus).
abstract: Growth and bilateral asymmetry of thyroid gland were studied in 291 fetuses (from 219 to 31,300 g) of the black-white cattle divided into 4 groups according to body weight. Relation between body weight (X) and thyroid weight (Y) was described using allometric equation Y = aXb. Allometric coefficient b was different in each of the four groups (1.198; 1.179; 1.314; 0.941) and amounted to 1.076 for the entire fetal period. The coefficient of fluctuating asymmetry of the thyroid gland decreased with increased fetal weight in the following way: 0.16; 0.10; 0.09; 0.07; this coefficient amounted to 0.02 for all the fetuses examined.
authors.affiliation: Department of Zoology, Faculty of Animal Husbandry, Agricultural University, Szczecin, Poland.
authors.forename: Z
authors.initials: Z
authors.lastname: Szuba
authors.forename: E
authors.initials: E
authors.lastname: Kalisińska
authors.forename: M
authors.initials: M
authors.lastname: Melosik
mesh_terms: D000818:Animals; D001835:Body Weight; D002417:Cattle / Q000196:embryology*; D005314:Embryonic and Fetal Development; D005260:Female; D005333:Fetus; D008297:Male; D009929:Organ Size; D013961:Thyroid Gland / Q000033:anatomy & histology / Q000196:embryology*