Matches in SemOpenAlex for { <https://semopenalex.org/work/W1984380212> ?p ?o ?g. }
Showing items 1 to 72 of
72
with 100 items per page.
- W1984380212 endingPage "219" @default.
- W1984380212 startingPage "219" @default.
- W1984380212 abstract "Embryo transfer after superovulation is commonly used for efficient embryo and animal production and for genetic improvement in cattle. However, the quality of collected embryos varies greatly, which affects pregnancy rate. Usually, poor quality embryos are related to low pregnancy rates after embryo transfer and low viability after cryopreservation. Therefore, it is important to improve chances for survival of poor quality embryos after embryo transfer. The objective of this experiment was to improve pregnancy rates by applying the assisted hatching technique to poor quality embryos. Embryos were collected from Japanese Black cows after superovulation on Day 7 post-insemination. After being washed, embryos were morphologically classified. Embryos having more than 30% degenerated cells were assigned as poor quality embryos. The assisted hatching of embryos (cutting the zona pellucida) was performed under a stereoscope or an inverted microscope by making a cutting slit on the zona pellucida for about 20% of its circumference using a micromanipulator equipped with a cutting needle and holding pipette. After cutting, single or two embryos were transferred fresh to one uterine horn of recipient cows on Day 7 of the estrous cycle. Pregnancy and calf production rates were compared between 2 embryo transfer groups composed of fresh zona-cut embryos (ZC group) or fresh embryos with non-cut zonae pellucidae (NZC group). Pregnancy rates were determined by rectal palpation on Day 45, and calf production rates were calculated by the following formula: number of calves born/number of pregnancies. Statistical analysis was carried out using the chi-square test. Pregnancy rates of poor quality embryos in the double ET ZC group (60.3%; 44 pregnancies/73 transfers) were significantly higher (P < 0.05) than those in the single ET NZC group (25.0%; 6 pregnancies/24 transfers) and in the single ET ZC group (44.0%; 37 pregnancies/84 transfers). Calf production rates were 67.3%, 45.5%, and 35.6% for the double ET ZC group, the double ET NZC group, and the single ET ZC group, respectively. Pregnancy rates of poor quality bovine embryos after double ET were remarkably improved by assisted hatching compared with those of single ET with non-assisted hatching. These results suggest that the combined methods of assisted hatching and double ET may be beneficial to produce calves from poor quality embryos." @default.
- W1984380212 created "2016-06-24" @default.
- W1984380212 creator A5037421671 @default.
- W1984380212 creator A5047014091 @default.
- W1984380212 creator A5047231999 @default.
- W1984380212 creator A5048524229 @default.
- W1984380212 date "2007-01-01" @default.
- W1984380212 modified "2023-09-24" @default.
- W1984380212 title "205 INCREASED PREGNANCY RATES OF POOR QUALITY BOVINE EMBRYOS BY ASSISTED HATCHING" @default.
- W1984380212 doi "https://doi.org/10.1071/rdv19n1ab205" @default.
- W1984380212 hasPublicationYear "2007" @default.
- W1984380212 type Work @default.
- W1984380212 sameAs 1984380212 @default.
- W1984380212 citedByCount "0" @default.
- W1984380212 crossrefType "journal-article" @default.
- W1984380212 hasAuthorship W1984380212A5037421671 @default.
- W1984380212 hasAuthorship W1984380212A5047014091 @default.
- W1984380212 hasAuthorship W1984380212A5047231999 @default.
- W1984380212 hasAuthorship W1984380212A5048524229 @default.
- W1984380212 hasConcept C140793950 @default.
- W1984380212 hasConcept C160099875 @default.
- W1984380212 hasConcept C16685009 @default.
- W1984380212 hasConcept C196843134 @default.
- W1984380212 hasConcept C2776010925 @default.
- W1984380212 hasConcept C2776537878 @default.
- W1984380212 hasConcept C2776690073 @default.
- W1984380212 hasConcept C2777005246 @default.
- W1984380212 hasConcept C2777542035 @default.
- W1984380212 hasConcept C2777744765 @default.
- W1984380212 hasConcept C2779234561 @default.
- W1984380212 hasConcept C54355233 @default.
- W1984380212 hasConcept C59843425 @default.
- W1984380212 hasConcept C71924100 @default.
- W1984380212 hasConcept C86803240 @default.
- W1984380212 hasConcept C87073359 @default.
- W1984380212 hasConceptScore W1984380212C140793950 @default.
- W1984380212 hasConceptScore W1984380212C160099875 @default.
- W1984380212 hasConceptScore W1984380212C16685009 @default.
- W1984380212 hasConceptScore W1984380212C196843134 @default.
- W1984380212 hasConceptScore W1984380212C2776010925 @default.
- W1984380212 hasConceptScore W1984380212C2776537878 @default.
- W1984380212 hasConceptScore W1984380212C2776690073 @default.
- W1984380212 hasConceptScore W1984380212C2777005246 @default.
- W1984380212 hasConceptScore W1984380212C2777542035 @default.
- W1984380212 hasConceptScore W1984380212C2777744765 @default.
- W1984380212 hasConceptScore W1984380212C2779234561 @default.
- W1984380212 hasConceptScore W1984380212C54355233 @default.
- W1984380212 hasConceptScore W1984380212C59843425 @default.
- W1984380212 hasConceptScore W1984380212C71924100 @default.
- W1984380212 hasConceptScore W1984380212C86803240 @default.
- W1984380212 hasConceptScore W1984380212C87073359 @default.
- W1984380212 hasIssue "1" @default.
- W1984380212 hasLocation W19843802121 @default.
- W1984380212 hasOpenAccess W1984380212 @default.
- W1984380212 hasPrimaryLocation W19843802121 @default.
- W1984380212 hasRelatedWork W194392144 @default.
- W1984380212 hasRelatedWork W1984380212 @default.
- W1984380212 hasRelatedWork W2104745485 @default.
- W1984380212 hasRelatedWork W2278881723 @default.
- W1984380212 hasRelatedWork W2296292182 @default.
- W1984380212 hasRelatedWork W2321854938 @default.
- W1984380212 hasRelatedWork W2351222126 @default.
- W1984380212 hasRelatedWork W2391920684 @default.
- W1984380212 hasRelatedWork W2392549933 @default.
- W1984380212 hasRelatedWork W2756712110 @default.
- W1984380212 hasVolume "19" @default.
- W1984380212 isParatext "false" @default.
- W1984380212 isRetracted "false" @default.
- W1984380212 magId "1984380212" @default.
- W1984380212 workType "article" @default.