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- W4313305332 endingPage "107185" @default.
- W4313305332 startingPage "107185" @default.
- W4313305332 abstract "The ovary and its hormones may have major effects on the in vitro developmental capacity of the oocytes it contains. We related intrinsic ovarian factors namely the presence of corpus luteum (CL) and/or dominant follicle (>8 mm) and the follicular count to cumulus expansion (CE), embryo development, and blastocyst quality in a bovine model. Cumulus-oocyte-complexes (COCs) were aspirated from follicles between 4 and 8 mm in diameter. In vitro embryo production was performed in a fully individual production system. The follicular fluid from which COCs were collected was pooled (per ovary) to evaluate the estrogen, progesterone, and insulin-like growth factor-1 (IGF-1) concentrations. Cumulus oocyte complexes collected from ovaries without a CL presented a greater CE than COCs derived from ovaries bearing CL. The absence of ovarian structures increased the blastocyst rate when compared to oocytes derived from ovaries with a CL, a dominant follicle, or both. Blastocysts derived from ovaries without a dominant follicle presented higher total cell numbers and a lower proportion of apoptosis than blastocysts derived from ovaries containing a dominant follicle. Cumulus oocyte complexes collected from ovaries with high follicular count resulted in higher cleavage than from ovaries with low follicular count, but the blastocyst rate was similar between groups. Ovaries bearing a CL had greater progesterone and IGF-1 follicular fluid concentrations in neighboring follicles than ovaries without a CL. Selection for bovine ovaries without CL or dominant follicle can have positive effects on CE, embryo development, and blastocyst quality in an individual embryo production system set-up." @default.
- W4313305332 created "2023-01-06" @default.
- W4313305332 creator A5004141119 @default.
- W4313305332 creator A5016477520 @default.
- W4313305332 creator A5018073266 @default.
- W4313305332 creator A5021348757 @default.
- W4313305332 creator A5041986950 @default.
- W4313305332 creator A5044375166 @default.
- W4313305332 creator A5048685893 @default.
- W4313305332 creator A5065867330 @default.
- W4313305332 creator A5069007210 @default.
- W4313305332 date "2023-02-01" @default.
- W4313305332 modified "2023-10-14" @default.
- W4313305332 title "Oocyte developmental capacity is influenced by intrinsic ovarian factors in a bovine model for individual embryo production" @default.
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