This study was conducted to investigate the effects of preincubation time, concentration and exposure time of sperm on in vitro fertilization of porcine follicular oocytes rnatured in in vitro. The results obtained are as follows ; 1. Effect of preincuhation time for porcine sperm capacitation on in vitro fertilization in medium with heparin was investigated. Normal fertilization rate was highest in 15 min(26.4%). However, there were no significant differences among preincuhation times of 5~90 min, 2. Normal fertilization rates of sperm concentrations were 17.0~26.5%, and normal fertilization rate from l l05cell /ml concentration was also higher than those of other sperm concentration. 3. Normal fertilization rates of sperm exposure time of 4, 8, 12, 16 and 20 hours were 6.1, 20.8, 27.8, 25.0 and 26.7%, respectively. Normal fertilization rate from sperm exposure time of 12 hours was also higher than that of other sperm exposure times.

This study was conducted to investigate the effects of co-culture for the development rate to morula /blastocyst stages of early porcine embryos, derived from oocytes matured and fertilized in vitro, with porcine endometrial cell monolayers(PEM) in the two different media, respectively. The rates of embryos developed to 2-, 4-, 8~16-cell and morula /blastocyst stage were 49.6, 40.5, 28.2 and 15.3% in Ham's F-10 with PEM, and 55.3, 45.9, 32.7, and 17.6% in TCM-HEPES with PEM, respectively. The above development rates to morula /blastocyst stages were significantly higher than those of the embryos cultured in the Ham's F-10 and TGM-HEPES without PEM(P<0.05). The in vitro development rates to the morula /blastocyst stage of 1-cell embryos cultured in Ham's F-10 and TCM-HEPES without PEM were 0~1.2%. Especially, most of embryos were observed to arrest the development beyond 4-cell stages. As shown in the above results, the co-culture of in vitro produced porcine embryos with PEM in the two different media enhanced the development of fertilized eggs to morula /blastocyst stages in vitro. However, we didn't find out any differences for the in vitro development to morula /blastocyst stages between Ham's F-10 and TcM-HEPES media.

본 연구는 돼지 액상정액을 인공수정용 100ml 플라스틱 병에 보존하면서 BF5희석액과 Butschwiler 희석액 간에 보존 온도별 차이를 조사하고, BF5 희석액에서의 글리세롤 농도의 효과를 조사하여 돼지 액상정액을 좀더 장기간 사용할 수 있는 방법을 찾고자 실시하였다. 돼지 액상정액을 5 냉장고에 보존하면서 조사한 바에 의하면, 37에서 0.5 및 2시간 배양후의 정자운동성은 전체 보존기간동안 BF5 희석액이 Butschwiler 희석액보다 유의하

소 난포란의 체외성숙율과 체외수정후 분할율을 향상시키기 위하여 성숙배양액에 FCS 첨가 효과를 조사하였으며 FCS의 첨가수준은 5-20%였고 사용된 기본배양액은 Dn(-BSA), Ham's F10 및 TCM199이었다. 난포직경 2-6mm 난포로부터 채란된 수정란을 39 배양기에서 28시간 성숙시킨후 동결융해정자 또는 비동결정자로 체외수정시켰다. FCS 무첨가구보다는 첨가구 성숙유리 향상되었으나 FCS 첨가의DM(-BSA)와 Ham's F10간에, 그리

본 연구는 종모우의 선발방법으로 난포란을 이용하여 실험실내 정자의 수정능력을 직접 검정하여 평가코자 시도되었다. 즉 본 실험은 후대검정중에 있는 한우 후보종모우 15두의 동결융해정자의 수정능력을 평가하기 위하여 정액을 고장액(HIS)에 처리한 후 DM에서 6시간 그리고 소 난포액이 20% 첨가된 DM에서 4시간 전배양하여 수정능을 획득시켜 정자의 활력과 첨체 반응율을 조사하였고 전배양된 정자의 체내(토끼 난관) 또는 체외수정능력을 조사하기 위하여 FCS