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Progesterone and Insulin‐Like Growth Factor I Levels in Blood of Boer Goats During Puerperium Out‐of‐Season in a Mild Climate Region
Author(s) -
Djuricic D,
Filipovic N,
Dobranic T,
Lipar M,
Prvanovic N,
Turk R,
Gracner D,
Stanin D,
Folnozic I,
Samardzija M
Publication year - 2011
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/j.1439-0531.2010.01740.x
Subject(s) - litter , estrous cycle , insulin like growth factor , boer goat , medicine , endocrinology , biology , zoology , insulin , seasonal breeder , growth factor , ecology , receptor
Contents 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.