RESUMO
The growth of the Gyr breed in Brazil in terms of genetic gain for milk, along with conditions for market, has led to the use of ovum pick-up in vitro production (OPU-IVP) as a leader in biotechnology for the multiplication of genetic material. The aim of this study was to investigate phenotypic correlations between OPU-IVP-linked characteristics and pregnancy rates registered in an embryo transfer program using Gyr cows as oocyte donors. Data collected from 211 OPU sessions and 298 embryo transfers during the years 2012 and 2013 were analyzed and statistical analysis was performed. Estimates of simple Pearson correlations were calculated for NVcoc and PVcoc (number and proportion of viable cumulus-oocyte complexes, respectively); NcleavD4 and PcleavD4 (number and proportion of cleaved embryos on day 4 of culture, respectively); NTembD7 and PTembD7 (number and proportion of transferable embryos on day 7 of culture, respectively); NPrD30 and PPrD30 (number and proportion of pregnancies 30 days after transfer, respectively); and NPrD60 and PPrD60 (number and proportion of pregnancies 60 days after transfer, respectively). Moderate to moderately high correlations were found for all numerical characteristics, suggesting these as the most suitable parameters for selection of oocyte donors in Gyr programs. NVcoc is proposed as a selection trait due to positive correlations with percentage traits and pregnancy rates 30 and 60 days after transfer.
Assuntos
Fertilização in vitro/veterinária , Animais , Bovinos , Transferência Embrionária/veterinária , Feminino , Fertilização in vitro/métodos , Doação de Oócitos/veterinária , Folículo Ovariano/diagnóstico por imagem , Óvulo/transplante , Fenótipo , Gravidez , Taxa de Gravidez , UltrassonografiaRESUMO
Este artigo analisa os aspectos jurídicos e bioéticos da prática médica da doação compartilhada de óvulos no contexto da Reprodução Assistida no Brasil. Trata-se de uma prática criada pela classe médica para auxiliar na obtenção de gametas femininos e beneficiar as pacientes que buscam alcançar a gravidez com assistência profissional (AU)
This paper examines the legal and bioethical aspects of medical practice of shared egg donation in the context of Assisted Reproduction in Brazil. This is a practice created by physicians to aid in obtaining female gametes and benefit patients seeking to achieve pregnancy with professional assistance (AU)
Assuntos
Humanos , Feminino , Gravidez , Doação de Oócitos/legislação & jurisprudência , Doação de Oócitos/ética , Óvulo/transplante , Fertilização in vitro/legislação & jurisprudência , Fertilização in vitro/ética , Comportamento Cooperativo , Temas Bioéticos , Contratos , Infertilidade/economia , Infertilidade/terapiaRESUMO
Las parejas estériles tratadas mediante fertilización in vitro y transferencia de embriones (FIVTE) requieren altos estándares de calidad. Habitualmente los nuevos programas de FIVTE necesitan generar resultados aceptables tan pronto como sea posible. En este trabajo se reporta la experiencia de un nuevo centro de FIVTE que realiza el procedimiento convencional y con donación de óvulos. Las pacientes fueron manejadas en grupos, con sincronización de sus ciclos menstruales con noretisterona. Ambas variantes del procedimieto dieron origen a embarazos clínicos desde el inicio de actividades. Se analizan los aspectos logísticos y metodológicos. En la actualidad, la meta es mejorar la eficacia y eficacia del programa