Maternal hypothyroidism and fetal chondro-osseous development in rats

The bone development of rat fetuses from female Wistar rats thyroidectomized prior to mating was studied, between 16 and 21 days of gestation. The parameters studied in each rat fetus were fetal weight, number of fetuses per litter, radiological data and frequency of appearance of ossification cente...

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Bibliographic Details
Published inBiology of the neonate Vol. 60; no. 6; p. 385
Main Authors Gil-Garay, R, Miralles-Flores, C, Obregón, M J, Escobar del Rey, F, Morreale de Escobar, G, Delgado-Baeza, E
Format Journal Article
LanguageEnglish
Published Switzerland 1991
Subjects
Animals
Body Weight
Bone Development - physiology
Female
Fetal Growth Retardation - physiopathology
Gestational Age
Hypothyroidism - physiopathology
Pregnancy
Pregnancy Complications - physiopathology
Rats
Rats, Inbred Strains
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Summary:The bone development of rat fetuses from female Wistar rats thyroidectomized prior to mating was studied, between 16 and 21 days of gestation. The parameters studied in each rat fetus were fetal weight, number of fetuses per litter, radiological data and frequency of appearance of ossification centers, diaphyseal radiological length of long bones, longitudinal ratio between epiphysis and diaphysis of long bones on cleaned and stained limbs, and volumetric tibial studies on the same limbs. Our results show a delay of fetal chondro-osseous development and a delay of weight increase in fetuses from thyroidectomized rats. After onset of fetal thyroid function, the fetal development begins a catch-up growth, which is not sufficient to completely overcome development delay prior to birth.
ISSN:0006-3126
DOI:10.1159/000243437