A Study on Survival Ability of Refrozen-Thawed Bovine IVF Embryos

한우 체외수정란의 재동결에 관한 연구

This study was conducted to investigate the survival and hatching rates after refrozen-thawed bovine IVF blastocysts. The survival rates after refrozen-thawed bovine IVF blastocysts produced on day 7, day 8 and day 9, were 66.6%(16/24), 62.5%(15/24) and 65.3%(17/26), respectively. The survival and hatching rates after the first frozen-thawed bovine JVF blastocysts were 90.0%(27 /30) and 70.0%(21 /30), but in refrozen-thawed bovine IVF blastocysts were 66.2%(49 /74) and 45.9%(34 /74), respectively. The results of this study were suggest that refrozen-thawed bovine IVF embryos had survival ability.