Wyniki wyszukiwania

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Developmental competence of bovine oocytes collected by transvaginal aspiration [OPU]

100%

Smorag Z., Katska L., Gogol P., Rynska B.

Folia Histochemica et Cytobiologica. Supplement

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1997

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tom 35

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nr 2

2

BCB test utility evaluated by caspase-3 activity in blastocysts developed from bovine oocytes with different G6PDH level

75%

Opiela J., Rynska B., Katska-Ksiazkiewicz L.

Annals of Animal Science

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2010

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tom 10

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nr 1

27-38

3

Effect of IGF-I, leptin, ghrelin and MAPK-ERK on the nuclear maturation of bovine oocytes

63%

Popelkova M., Sirotkin A. V., Bezakova A., Makarevic A. V., Pivko J., Kacmarik J., Kovac G.

Bulletin of the Veterinary Institute in Puławy

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2006

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tom 50

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nr 2

4

The toxic effect of persistent chlorinated hydrocarbons on maturation and in vitro fertilization of bovine oocytes

63%

Faundez R., Sitarska E., Klucinski W.

Folia Histochemica et Cytobiologica. Supplement

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1997

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tom 35

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nr 2

5

Genetical and biotechnological methods of utilization of female reproductive potential in mammals

51%

Katska-Ksiazkiewicz L., Lechniak-Cieslak D., Korwin-Kossakowska A., Alm H., Rynska B., Warzych E., Sosnowski J., Sender G.

Reproductive Biology

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2006

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tom 06

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nr Suppl.1

6

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Morphology and developmental potential of bovine parthenotes after spontaneous activation in vitro

51%

Lechniak D., Cieslak D., Sosnowski J.

Journal of Applied Genetics

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1998

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tom 39

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nr 2

Spontaneous parthenogenetic activation of bovine oocytes in an in vitro maturation and fertilization system (IVM/IVF) is described. Altogether, 1403 follicular oocytes, collected by the aspiration method, were matured in vitro and then cultured without insemination in the same conditions as a group of inseminated oocytes. After 48-72 h of additional culture, 141 oocytes (10%) were found to be spontaneously activated. Morphological evaluation revealed that the number of blastomeres within parthenotes ranged from 2 to 16 cells, with a minority (15.7%) comprising of 9-16 blastomeres. According to a cytogenetic analysis, only 1.2% of the analysed parthenotes consisted of more than 9 cells. Parthenotes may not be distinguished from embryos produced in vitro and spontaneous parthenogenetic activation in an IVM/IVF system indicates suboptimal culture conditions. A group of non-inseminated oocytes should be included in each experiment to serve as a control. Spontaneously activated bovine parthenotes only occasionaly developed beyond the 8-blastomere stage in a common IVM/IVF system. The incidence of parthenotes interferes with the efficiency of in vitro embryo production but it is doubtful whether it lowers the pregnancy rate after transfer of IVF embryos.

Ograniczanie wyników

Developmental competence of bovine oocytes collected by transvaginal aspiration [OPU]

BCB test utility evaluated by caspase-3 activity in blastocysts developed from bovine oocytes with different G6PDH level

Effect of IGF-I, leptin, ghrelin and MAPK-ERK on the nuclear maturation of bovine oocytes

The toxic effect of persistent chlorinated hydrocarbons on maturation and in vitro fertilization of bovine oocytes

Genetical and biotechnological methods of utilization of female reproductive potential in mammals

Morphology and developmental potential of bovine parthenotes after spontaneous activation in vitro