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Embryo recovery and pregnancy rates after the delay of ovulation and fixed time insemination in superstimulated beef cows
(2002-04-01)
The aim of this study was to evaluate the effect of delaying ovulation subsequent to superstimulation of follicular growth in beef cows (Bos indicus) on embryo recovery rates and the capacity of embryos to establish ...
Embryo recovery and pregnancy rates after the delay of ovulation and fixed time insemination in superstimulated beef cows
(2002-04-01)
The aim of this study was to evaluate the effect of delaying ovulation subsequent to superstimulation of follicular growth in beef cows (Bos indicus) on embryo recovery rates and the capacity of embryos to establish ...
Inducing ovulation with oestradiol cypionate allows flexibility in the timing of insemination and removes the need for gonadotrophin-releasing hormone in timed AI protocols for dairy cows
(Csiro Publishing, 2017-01-01)
The effects of addition of gonadotrophin-releasing hormone (GnRH) to a progesterone plus oestradiol-based protocol and timing of insemination in Holstein cows treated for timed AI (TAI) were evaluated. Cows (n=481) received ...
Progesterone-based strategies to induce ovulation in prepubertal Nellore heifers
(2013-01-01)
Four experiments were conducted to evaluate hormonal strategies to induce ovulation in Nellore heifers. In experiment 1, heifers (N = 1039) received a controlled internal drug release (CIDR) of fourth use (CIDR-4) on Day ...
Progesterone-based strategies to induce ovulation in prepubertal Nellore heifers
(2013-01-01)
Four experiments were conducted to evaluate hormonal strategies to induce ovulation in Nellore heifers. In experiment 1, heifers (N = 1039) received a controlled internal drug release (CIDR) of fourth use (CIDR-4) on Day ...
Ovarian function in cows submitted to acute stress during proestrus
(Elsevier B.V., 2011-06-01)
Studies in which ACTH was administrated in heifers after the occurrence of luteolysis showed a delay in the onset of estrus and the estrus duration was shortened. This study evaluated the effect of acute stress by road ...