Open AccessGonadotropic action of medication administered in various doses to synchronise the oestrus of anoestral sheep
Author(s) -
I. Ralchev,
T. Maslev,
M. Todorov,
Ts. Hristova
Publication year - 2008
Publication title -
biotechnology in animal husbandry/biotechnology in animal husbandry
Language(s) - English
Resource type - Journals
eISSN - 2217-7140
pISSN - 1450-9156
DOI - 10.2298/bah0804067r
Subject(s) - estrous cycle , breed , ovary , zoology , hormone , reproduction , medicine , biology , endocrinology , physiology , ecology
The experiment included 20 ewes of the Tsigai breed, allocated in two groups of 10 animals each. Inducing of oestrus synchronisation was performed during anoestral season (April - May) through vaginal sponges containing gestagens, and administration of Gravohormon (Vetbiopharm, Bulgaria) - 500 UI in group 1 ewes and 1000 UI in group 2 ewes. Macromorphological study of the ovaries was carried out by means of laparoscopy after the adopted methods - on the 56th hour, 72nd hour and 5th day following sponge withdrawal and injection of gonadotropin. The levels of the steroid hormones progesteron and 17?-oestradiol were recorded in three ewes per each group at different times according to the experiment scheme. The histological structure of the ovaries was determined in seven animals subjected to ovariectomy.