title: Influence of hormonal imprinting on hormone level. Permanent receptor damaging effect of pituitary hormones administered to newly-hatched cockerels.
abstract: The overlapping effect of TSH and FSH on the gonad and on the thyroid gland can be demonstrated in cockerels even at the age of five weeks. These hormones influence the secretion of testosterone in a similar way and to a similar extent, while on the thyroxine level the influence of the specific hormone is more pronounced. Neonatal FSH and TSH treatment considerably decreased the basal testosterone level measured at the age of five weeks. Neonatal FSH treatment increased the basal T4 level while TSH treatment decreased it. The effect of TSH treatment administered at the age of five weeks in increasing the testosterone level was weakened after neonatal pretreatment with any iodine hormone. The effect of TSH treatment could only be inhibited by neonatal FSH pretreatment. Neonatal pretreatment with any of the trophormones caused a diminution of the T4 level augmenting of FSH and TSH administered at the age of five weeks.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000097:blood*; D005640:Follicle Stimulating Hormone / Q000494:pharmacology*; D011200:Poultry; D013739:Testosterone / Q000097:blood*; D013972:Thyrotropin / Q000494:pharmacology*; D013974:Thyroxine / Q000097:blood*
chemical_list: D013739:Testosterone; D005640:Follicle Stimulating Hormone; D013972:Thyrotropin; D013974:Thyroxine