Short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation
Contents The objective of this study was to determine, in sheep, the effect of a short-term undernutrition on growth dynamics and competence of pre-ovulatory follicles. Synchronization of sexual cycles and induction of ovulation were performed, with progestagens and gonadotrophins, in 14 adult female sheep. Morphological characteristics and developmental competence of ovarian follicles to achieve ovulation were determined by imaging techniques (ultrasonography and laparoscopy) and blood sampling. All the animals ovulated and mean ovulation rates were similar between groups (2.0 ± 0.6 corpora lutea in control ewes and 2.2 ± 0.8 in undernourished sheep). However, nutritional restriction, even during a short period, was related to the presence of large follicles in static growing phase which, despite reaching ovulation, persisted static during the induced follicular phase and evidenced functional alterations as there was no inhibition of the development of subordinate follicles. Thus, this study suggests the existence of deleterious effects from short-term undernutrition on functionality of pre-ovulatory follicles, which can compromise fertility. © 2009 Blackwell Verlag GmbH.
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dig-inia-es-20.500.12792-43862020-12-15T09:54:26Z Short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation Sosa, C. Gonzalez-Bulnes, A. Abecia, J. A. Forcada, F. Meikle, A. Contents The objective of this study was to determine, in sheep, the effect of a short-term undernutrition on growth dynamics and competence of pre-ovulatory follicles. Synchronization of sexual cycles and induction of ovulation were performed, with progestagens and gonadotrophins, in 14 adult female sheep. Morphological characteristics and developmental competence of ovarian follicles to achieve ovulation were determined by imaging techniques (ultrasonography and laparoscopy) and blood sampling. All the animals ovulated and mean ovulation rates were similar between groups (2.0 ± 0.6 corpora lutea in control ewes and 2.2 ± 0.8 in undernourished sheep). However, nutritional restriction, even during a short period, was related to the presence of large follicles in static growing phase which, despite reaching ovulation, persisted static during the induced follicular phase and evidenced functional alterations as there was no inhibition of the development of subordinate follicles. Thus, this study suggests the existence of deleterious effects from short-term undernutrition on functionality of pre-ovulatory follicles, which can compromise fertility. © 2009 Blackwell Verlag GmbH. 2020-10-22T16:56:40Z 2020-10-22T16:56:40Z 2010 journal article http://hdl.handle.net/20.500.12792/4386 10.1111/j.1439-0531.2009.01483.x eng Attribution-NonCommercial-ShareAlike 4.0 International http://creativecommons.org/licenses/by-nc-sa/4.0/ open access |
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Contents The objective of this study was to determine, in sheep, the effect of a short-term undernutrition on growth dynamics and competence of pre-ovulatory follicles. Synchronization of sexual cycles and induction of ovulation were performed, with progestagens and gonadotrophins, in 14 adult female sheep. Morphological characteristics and developmental competence of ovarian follicles to achieve ovulation were determined by imaging techniques (ultrasonography and laparoscopy) and blood sampling. All the animals ovulated and mean ovulation rates were similar between groups (2.0 ± 0.6 corpora lutea in control ewes and 2.2 ± 0.8 in undernourished sheep). However, nutritional restriction, even during a short period, was related to the presence of large follicles in static growing phase which, despite reaching ovulation, persisted static during the induced follicular phase and evidenced functional alterations as there was no inhibition of the development of subordinate follicles. Thus, this study suggests the existence of deleterious effects from short-term undernutrition on functionality of pre-ovulatory follicles, which can compromise fertility. © 2009 Blackwell Verlag GmbH. |
| format |
journal article |
| author |
Sosa, C. Gonzalez-Bulnes, A. Abecia, J. A. Forcada, F. Meikle, A. |
| spellingShingle |
Sosa, C. Gonzalez-Bulnes, A. Abecia, J. A. Forcada, F. Meikle, A. Short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation |
| author_facet |
Sosa, C. Gonzalez-Bulnes, A. Abecia, J. A. Forcada, F. Meikle, A. |
| author_sort |
Sosa, C. |
| title |
Short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation |
| title_short |
Short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation |
| title_full |
Short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation |
| title_fullStr |
Short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation |
| title_full_unstemmed |
Short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation |
| title_sort |
short-term undernutrition affects final development of ovulatory follicles in sheep synchronized for ovulation |
| publishDate |
2010 |
| url |
http://hdl.handle.net/20.500.12792/4386 |
| work_keys_str_mv |
AT sosac shorttermundernutritionaffectsfinaldevelopmentofovulatoryfolliclesinsheepsynchronizedforovulation AT gonzalezbulnesa shorttermundernutritionaffectsfinaldevelopmentofovulatoryfolliclesinsheepsynchronizedforovulation AT abeciaja shorttermundernutritionaffectsfinaldevelopmentofovulatoryfolliclesinsheepsynchronizedforovulation AT forcadaf shorttermundernutritionaffectsfinaldevelopmentofovulatoryfolliclesinsheepsynchronizedforovulation AT meiklea shorttermundernutritionaffectsfinaldevelopmentofovulatoryfolliclesinsheepsynchronizedforovulation |
| _version_ |
1758004604364128256 |