2003
DOI: 10.1016/s0093-691x(02)01246-3
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Factors affecting oocyte quality and quantity in commercial application of embryo technologies in the cattle breeding industry

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Cited by 259 publications
(235 citation statements)
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“…In addition, OPU performed at 3-or 4-day intervals is a scheme that can be used for up to 4 consecutive months (Petyim et al 2003) and has been shown to yield more oocytes per session and embryos from each oocyte batch collected at 3-day intervals (Merton et al 2003), although we found no significant differences between same intervals (data non shown). Our hypothesis is further supported by the fact that retinoid treatment has been previously shown to increase litter size in the gilt (Brief & Chew 1983, Coffey & Britt 1993 and rabbit (Besenfelder et al 1996), and improve embryonic quality without modifying ovulation rates (Shaw et al 1995) in superovulated cows (Shaw et al 1995) and ewes (Eberhardt et al 1999).…”
Section: Embryos Transferred Pregnancy (%)mentioning
confidence: 53%
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“…In addition, OPU performed at 3-or 4-day intervals is a scheme that can be used for up to 4 consecutive months (Petyim et al 2003) and has been shown to yield more oocytes per session and embryos from each oocyte batch collected at 3-day intervals (Merton et al 2003), although we found no significant differences between same intervals (data non shown). Our hypothesis is further supported by the fact that retinoid treatment has been previously shown to increase litter size in the gilt (Brief & Chew 1983, Coffey & Britt 1993 and rabbit (Besenfelder et al 1996), and improve embryonic quality without modifying ovulation rates (Shaw et al 1995) in superovulated cows (Shaw et al 1995) and ewes (Eberhardt et al 1999).…”
Section: Embryos Transferred Pregnancy (%)mentioning
confidence: 53%
“…Gonadotrophins such as FSH either alone (Bousquet et al 1999, Goodhand et al 1999, Sirard et al 1999 or in combination with LH (Blondin et al 2002, see a review by Merton et al 2003) and pregnant mare serum gonadotrophin (Pieterse et al 1991) have been used to improve the outcome of OPU in adult donor cows. Oocytes from superovulated cows are developmentally more competent than their non-stimulated counterparts (Faber et al 2003, Merton et al 2003, and specific changes in superovulatory treatment can greatly increase developmental competence of the oocyte (Blondin et al 2002).…”
Section: Discussionmentioning
confidence: 99%
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“…Apesar de alguns autores relatarem que a utilização de FSH antes da punção aumenta o número de oócitos recuperados (Merton et al, 2003), no presente experimento isso não ocorreu (P>0,05), não havendo diferença no núnero de oócitos recuperados por sessão de punção (Tab. 1) e taxa de recuperação (Tab.…”
Section: Resultsunclassified
“…Nibartet al (1995), demonstraram que se pode obter até 18 gestações em três meses utilizando a aspiração folicular, enquanto que com a TE convencional, no mesmo período, seria possível obter apenas cinco gestações. Outras vantagens da OPU-PIV são a obtenção de oócitos em qualquer fase do ciclo estral sem utilização de tratamento gonadotrófico (Merton et al, 2003), permitindo realizar repetidas recuperações de oócitos de animais vivos sem trauma aparente do trato reprodutivo, a produção de embriões oriundos de vacas com patologias reprodutivas adquiridas (Rodrigues, 2001), ou vacas prenhez, durante o primeiro trimestre de gestação (Meintjes et al, 1995) ou em novilhas pré-puberes (Brogliatti& Adams, 1996). Além destas vantagens tem-se a maximização do uso do sêmen, permitindo maior produção de embriões com doses de alto valor comercial e inclusive sêmen sexado (Faber et al, 2003).…”
Section: Aspiração Folicular Guiada Por Ultra-sonografia Para Produçãunclassified