Progesterone and insulin-like growth factor I levels in blood of Boer goats during puerperium out-of-season in a mild climate region.
The aims of this study were to compare insulin-like growth factor-I (IGF-I) and progesterone concentrations as indicators of cycle activity in the blood of Boer goats during puerperium out-of-season in mild climate conditions and to investigate the influence of parity and litter size on the concentration of IGF-I and progesterone in serum during the study period. Twenty Boer (8 primiparous and 12 pluriparous) goats were examined in this study. Blood samples were taken every 4 days starting on the 3rd day and up to the 40th day of puerperium. IGF-I and progesterone (P4) blood levels were determined using radio immune assay (RIA). Results indicated cyclic ovarian activity outside the breeding season in 18 of 20 Boer goats. IGF-I levels in blood sera followed oestrus and cyclic ovarian activity. IGF-I concentrations correlated significantly with P4 concentrations. The IGF-I peak preceded the P4 peak by approximately 8 days in cycling goats. IGF-I and P4 blood levels were not influenced by parity or litter size. Changes in blood serum P4 and IGF-I concentrations levels during puerperal period can assist in the evaluation of reproductive status of goats.
Department of Physiology and Radiobiology, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova, Zagreb, Croatia.
D
D
Djuricic
N
N
Filipovic
T
T
Dobranic
M
M
Lipar
N
N
Prvanovic
R
R
Turk
D
D
Gracner
D
D
Stanin
I
I
Folnozic
M
M
Samardzija
D000818:Animals; D002980:Climate; D005260:Female; D006041:Goats / Q000097:blood*; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D049590:Postpartum Period / Q000097:blood* / Q000378:metabolism; D011374:Progesterone / Q000097:blood*; D012621:Seasons; D013997:Time Factors
D011374:Progesterone; D007334:Insulin-Like Growth Factor I