Superovulation, embryo yield, quality, and embryo transfer in sheep
1999
Riha, J. (Vyzkumny Ustav pro Chov Skotu, Rapotin (Czech Republic)) | Cunat, L.
Merino ewes and Oxford Down ewes (n=16) were superovulated with intravaginal sponges (40 mg Norgestomet, Intervet France, 14 days) and FSH-P (Folicotropin, Spofa Prague, total dose: 10 mg). Suffolk, Tsigai and Wallachian ewes (n=21) were treated with CIDR (New Zealand, 14 days) - PMSG - Ovagen. Synchronizing devices used in donor and recipient sets were withdrawn at the same time. Embryos were collected on Day 6 after 1st service and transferred by the laparoscopic technique. Low and non-significant differences (P0.05) were found between specific sets and regimens. Data on Tsigai ewes are not included in classification of superovulation response. In total, 120 embryos were transferred to 81 recipients, 57 ewes were pregnant (70.4 %). Embryos survival rate determined by the obstetric control amounted to 61.7 % (74/120), i.e. 1.3 lamb per lambed recipient.
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