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Showing 1 to 6 of 6 for “"transvaginal follicular aspiration"”.
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Ultrasound-guided transvaginal follicular aspiration to provide a source of bovine oocytes for gene microinjection
… oocytes from cows via ultrasound-guided transvaginal follicular aspiration. Transvaginal oocyte recovery combined with in vitro maturation, fertilization, and culture (IVMlIVFIIVC) can produce pre-implantation stage bovine embryos and also supply a source of ova for gene microinjection. …
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Effects of Energy Balance on Ovarian Activity and Recovered Oocytes in Holstein Cows Using Transvaginal Follicular Aspiration
… throughout the fall trial. Ultrasound guided transvaginal follicular aspirations were conducted twice weekly between d 30 and 100 of lactation. Follicle size and number were recorded. Follicular fluid (FF) was aspirated from the largest follicle, and serum samples were collected for hormone …
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Effects of transvaginal follicular aspiration on oocyte recovery, hormonal profiles before and after GnRH, and growth factor influence on embryo development
… were evaluated during 16 wk of ultrasound-guided transvaginal follicular aspiration (TVF A) and prior to and following administration of GnRH at the cessation ofTVFA. Previously aspirated (PAC, n = 4) and non-aspirated, non-lactating (AC, n = 4) Holstein cows were subjected to 16 wk of …
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In-vitro developmental potential of bovine oocytes obtained by transvaginal follicular aspiration as related to their morphological quality and after microinjection of DNA
… of oocytes of differing quality retrieved using transvaginal follicular aspiration (TVFA) and following DNA injection was examined. Eight cows were subjected to twice weekly TVF A for 16 wk. Oocytes retrieved were graded and placed in an in-vitro maturation, fertilization and co-culture …
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Reproduction and Endocrine Aspects of Early and Mid Lactation Holstein Cows
… status on metabolic and endocrine measures, follicular development, and the quality of oocytes obtained from Holstein cows. Holstein cows were selected prior to calving and assigned to the early lactation (EL) group (n=8) while, cows at d 90 postpartum were selected for the mid-lactation (ML) …
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Analysis of early lactation reproductive characteristics in Holstein cows
Ultrasound-guided transvaginal follicular aspiration was used to obtain oocytes from cows to study follicular development and oocyte morphology. Follicular aspiration was conducted once during wk 1 to 12 postpartum on 120 lactating cows with 6 groups, separated by biweekly intervals. Approximately …