Fixed-time AI protocols replacing eCG with a single dose of FSH were less effective in stimulating follicular growth, ovulation, and fertility in suckled-anestrus Nelore beef cows》.pdfVIP

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Fixed-time AI protocols replacing eCG with a single dose of FSH were less effective in stimulating follicular growth, ovulation, and fertility in suckled-anestrus Nelore beef cows》.pdf

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Fixed-time AI protocols replacing eCG with a single dose of FSH were less effective in stimulating follicular growth, ovulation, and fertility in suckled-anestrus Nelore beef cows》.pdf

Animal Reproduction Science 124 (2011) 12–18 Contents lists available at ScienceDirect Animal Reproduction Science journal homepage: /locate/anireprosci Fixed-time AI protocols replacing eCG with a single dose of FSH were less effective in stimulating follicular growth, ovulation, and fertility in suckled-anestrus Nelore beef cows J.N.S. Sales a , G.A. Crepaldi a , R.W. Girotto b , A.H. Souza a , P.S. Baruselli a,∗ a Departamento de Reproduc¸ ão Animal, FMVZ-USP, Rua Prof. Orlando Marques de Paiva 87, CEP: 05508-270, São Paulo, SP, Brazil b RG Genética Avanc¸ ada, Rua 1, Sala 03, n ◦ 481, CEP: 78635-000, Água Boa, MT, Brazil a r t i c l e i n f o a b s t r a c t Article history: The aim of the present study was to evaluate the effects of a single treatment with FSH Received 8 June 2010 on diameter of the largest follicle and on conception rates of suckled Bos indicus beef cows Received in revised form 19 January 2011 submitted to timed artiﬁcial insemination (TAI). Four hundred ﬁfty-six suckled anestrous Accepted 7 February 2011 Nelore beef cows at 30–60 days postpartum were assigned to treatments. At the ﬁrst day Available online 13 February 2011 of the estrous synchronization protocol (Day 0), all cows received a progesterone-releasing intravaginal device plus 2 mg of estradiol benzoate. On Day 8, cows were assigned to blocks Keywords: according to the diameter of the largest follicle and then allocated to one of three treat-