2018
DOI: 10.1590/1678-4162-9679
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Abstract: The aim of this study was to evaluate hCG treatment on ovarian response and on pregnancy rate using a 9-day oestrus synchronization protocol in Santa Ines ewes. On a random oestrus cycle day, ewes received an intravaginal progesterone device (Primer-PR®, Tecnopec, Brazil). Nine days later (Day 9), 30µg of d-cloprostenol (Prolise®, Syntex, Argentina) and 250IU of eCG (Folligon®, Intervet, Brazil) were administered and the progesterone device was removed. This moment, the ewes were randomly assigned on two group… Show more

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Cited by 9 publications
(11 citation statements)
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“…However, the results obtained in this study in group B5 agreement with (Medan et al, 2002;Husein et al, 2005;Zonturlu et al, 2018). In contrast, decrease kilogram kids per goats joined in group B4 was similar to other studies reported (Fonseca et al, 2005;Dias et al, 2018) hCG treated to improve ovulation synchronization and in contrast decrease in the pregnancy rate. Provide evidence that decrease kilograms born per goat kidding in group B4 as compared with other groups.…”
Section: Discussionsupporting
confidence: 90%
“…However, the results obtained in this study in group B5 agreement with (Medan et al, 2002;Husein et al, 2005;Zonturlu et al, 2018). In contrast, decrease kilogram kids per goats joined in group B4 was similar to other studies reported (Fonseca et al, 2005;Dias et al, 2018) hCG treated to improve ovulation synchronization and in contrast decrease in the pregnancy rate. Provide evidence that decrease kilograms born per goat kidding in group B4 as compared with other groups.…”
Section: Discussionsupporting
confidence: 90%
“…Hence, these results suggest a disruption of follicular development after hCG administration, which causes the growth and maintenance of large follicles that, in turn, may be involved in impairments of estrous behavior and ovulation and the lowering of the fertility rate. These findings support and would explain the decreased pregnancy rates previously reported after hCG treatments [ 9 , 10 ].…”
Section: Discussionsupporting
confidence: 89%
“…These first data in sheep supported that hCG administration increased prolificacy but decreased fertility. More recent data support that sheep treated with hCG, in spite of inducing more synchronized ovulation than controls without gonadotrophin treatment, had a reduced pregnancy rate after TAI [ 10 ].…”
Section: Introductionmentioning
confidence: 99%
“…Hormonal treatment to control ovulation and reproduction is an important tool to obtaion the successful breeding and increasing the number of pregnant females (Dias et al, 2018), resulting in a short breeding period and a more uniform newborn crop (Husein and Kridli, 2003). Previous studies reported that the key element of methods for estrus synchronization in small ruminants to control of luteolysis and lifespan of the corpus luteum (Cavalcanti et al, 2012).…”
Section: Introductionmentioning
confidence: 99%