[Changes in the follicle system and the population of tertiary follicles in sheep after the administration of PMSG in anestrus].
The total quantitative changes of ovaries, proportion of atretic and non atretic follicles and changes of tertiary follicles in sheep after administration of increasing doses of PMSG during the anoestrous period were observed. In experimental groups the statistically significant increase of average weight, volume and dimensions of ovaries in comparison with control group were determined biometrically. The average number of tertiary follicles was greater in experimental groups but at the same time we observed a higher proportion of atretic follicles (64% of the total number in the control group; 71-77% in the experimental groups). In the group of sheep administered a dose of 1500 m.u. PMSG we determined a high proportion of luteinized follicles (as much as 21% of the total number of atretic follicles). The total number of small follicles in the so called transient phase in the comparison of experimental and control groups was not changed significantly. In the experimental group an increased incidence of preovulatory follicles and a reduction of tertiary follicle dimensions in the period of follicle cavity formation was determined.
Tokos
M
M
Arendarcik
J
J
Laurincik
J
J
D000780:Anestrus / Q000187:drug effects* / Q000502:physiology; D000818:Animals; D004971:Estrus / Q000187:drug effects*; D005260:Female; D006064:Gonadotropins, Equine / Q000494:pharmacology*; D006080:Ovarian Follicle / Q000187:drug effects*; D012756:Sheep / Q000502:physiology*
D006064:Gonadotropins, Equine
Zmeny folikulárneho aparátu a populácie terciárnych folikulov u oviec po podaní PMSG v anestrickom období.