Consideration of non-surgical embryo transfer at pig farms
2019
Omagari, H. (Saga Prefectural Livestock Experiment Station, Takeo (Japan)) | Misumi, K. | Miyashita, M. | Nagafuchi, S. | Yamashita, S. | Hoshi, H. | Hirayama, Y. | Yoshioka, K.
To develop a procedure for piglet production by embryo transfer (ET) at pig farms, we examined the effects of (1) the incubation period after the warming of vitrified embryos and (2) the body position of the ET recipients on the pregnancy success rate. For donor embryos, we used vitrified embryos just after warming or incubated at 38 ℃ for 2 hours after warming. The embryos were transferred non-surgically via a deep intrauterine catheter into the uterus of 25 recipient sows in a standing or lying position. Piglets were born only when the non-surgical ET was performed with the recipient in a lying position, with or without the 2-hour incubation period. Based on these results, vitrified and warmed embryos in a thermos bottle containing water at 38 ℃ were transported from Saga Prefectural Livestock Experiment Station to two commercial pig farms in Saga Prefecture. The transported embryos were transferred non-surgically to a total of 10 sows in a lying position at farms. As a result, one sow became pregnant but failed to farrow.
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