NonSurgical Embryo Recovery from Estrus-Synchronized or Superovulated Morada Nova Ewes: A Feasible Strategy for Sheep Embryo Banking

Aline Matos Arrais; Marco Roberto Bourg de Mello; Gabriel Brun VerganiLucas Machado FigueiraSérgio Novita EstevesVerônica Schinaider do Amaral PereiraPawel Mieczyslaw BartlewskiMaria Emilia Franco OliveiraJoanna Maria Gonçalves Souza-FabjanJeferson Ferreira da Fonseca

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NonSurgical Embryo Recovery from Estrus-Synchronized or Superovulated Morada Nova Ewes: A Feasible Strategy for Sheep Embryo Banking

机译：NonSurgical Embryo Recovery from Estrus-Synchronized or Superovulated Morada Nova Ewes: A Feasible Strategy for Sheep Embryo Banking

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This study assessed the feasibility of in vivo embryo production and nonsurgical embryo recovery (NSER) in Morada Nova ewes (an endangered native Brazilian breed of sheep) subjected to different estrus synchronization and/or superovulation protocols. Ewes received intravaginal sponges soaked with 60 mg medroxyprogesterone acetate (MAP), which were kept in place for six (G6; n = 12), nine (G9; n = 12), or 12 (G12; n = 12) days. Half of the ewes in each group remained estrus synchronized only (SYNCH) and the other half was superovulated (SOV) with 133 mg porcine follicle-stimulating hormone (pFSH). There were no differences (p > 0.05) in antral follicle counts determined with ultrasonography 60 hours before MAP sponge removal (or at the time of the first pFSH dose) among G6 (6.4 ± 0.9), G9 (6.2 ± 0.7), and G12 (5.5 ± 0.6). Estrus responses and NSER success rates did not vary (p > 0.05) among the three progestin-treatment groups of ewes for either estrus-induced or superovulated animals. The onset of estrus occurred 10–12 hours later (p 0.05) for G6 (1.0 ± 0.3 and 2.5 ± 1.5), G9 (1.3 ± 0.5 and 4.8 ± 2.0), and G12 groups (1.0 ± 0.3 and 4.8 ± 2.3; estrus-synchronized and superovulated ewes, respectively). In conclusion, progestogen pretreatment of different durations and NSER can be employed in Morada Nova ewes, resulting in reasonable viable embryo recovery rates in both estrus-synchronized and superovulated animals. Therefore, both techniques are suitable for use in commercial settings as well as small ruminant conservation programs.

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《Biopreservation and biobanking》 |2021年第5期|360-368|共9页
作者
Aline Matos Arrais; Marco Roberto Bourg de Mello; Gabriel Brun VerganiLucas Machado FigueiraSérgio Novita EstevesVerônica Schinaider do Amaral PereiraPawel Mieczyslaw BartlewskiMaria Emilia Franco OliveiraJoanna Maria Gonçalves Souza-FabjanJeferson Ferreira da Fonseca;
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Departamento de Reprodução e Avaliação Animal, Universidade Federal Rural do Rio de Janeiro;

Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista;

Faculdade de Veterinária, Universidade Federal FluminenseEmbrapa Pecuária SudesteDepartment of Biomedical Sciences, Ontario Veterinary College, University of GuelphEmbrapa Caprinos e Ovinos, Coronel Pacheco;

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正文语种英语
中图分类细胞生物学;
关键词
in vivo embryo production; naturalized breed; NSER; ovine; superovulation;

NonSurgical Embryo Recovery from Estrus-Synchronized or Superovulated Morada Nova Ewes: A Feasible Strategy for Sheep Embryo Banking

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