Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs
Plasma progesterone concentrations were determined every 10 days for 38 grazing Menz ewe lambs from weaning until conception. Lambs were either fed extra supplementry concentrates and/or drenched for endoparasites. Inadequate nutrition delayed puberty onset by 4 to 5 months. Progesterone concentrati...
| Autores principales: | , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
1993
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/28860 |
| _version_ | 1855525009475239936 |
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| author | Mukasa-Mugerwa, E. Mutiga, E.R. |
| author_browse | Mukasa-Mugerwa, E. Mutiga, E.R. |
| author_facet | Mukasa-Mugerwa, E. Mutiga, E.R. |
| author_sort | Mukasa-Mugerwa, E. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Plasma progesterone concentrations were determined every 10 days for 38 grazing Menz ewe lambs from weaning until conception. Lambs were either fed extra supplementry concentrates and/or drenched for endoparasites. Inadequate nutrition delayed puberty onset by 4 to 5 months. Progesterone concentrations, determined by the ELISA technique, were basal before puberty. Subsequently, 63 percent lambs exhibited a `silent ovulation' prior to first behavioural oestrus but, transient rises of progesterone were not observed in 45 percent of lambs conceiving at first mating. Further, first oestrous was unovulatory (non-pubertal) in 21.1 percent of animals which may bias estimates of puberty onset based only on first oestrous behaviour. 5 percent of lambs exhibited a gestational oestrous. |
| format | Journal Article |
| id | CGSpace28860 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1993 |
| publishDateRange | 1993 |
| publishDateSort | 1993 |
| record_format | dspace |
| spelling | CGSpace288602023-02-15T09:57:39Z Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs Mukasa-Mugerwa, E. Mutiga, E.R. tropics lambs menz ewe lambs sexual maturity progesterone oestrous cycle animal nutrition age weight Plasma progesterone concentrations were determined every 10 days for 38 grazing Menz ewe lambs from weaning until conception. Lambs were either fed extra supplementry concentrates and/or drenched for endoparasites. Inadequate nutrition delayed puberty onset by 4 to 5 months. Progesterone concentrations, determined by the ELISA technique, were basal before puberty. Subsequently, 63 percent lambs exhibited a `silent ovulation' prior to first behavioural oestrus but, transient rises of progesterone were not observed in 45 percent of lambs conceiving at first mating. Further, first oestrous was unovulatory (non-pubertal) in 21.1 percent of animals which may bias estimates of puberty onset based only on first oestrous behaviour. 5 percent of lambs exhibited a gestational oestrous. 1993 2013-05-06T07:01:36Z 2013-05-06T07:01:36Z Journal Article https://hdl.handle.net/10568/28860 en Limited Access Journal of Applied Animal Research;3: 31-38 |
| spellingShingle | tropics lambs menz ewe lambs sexual maturity progesterone oestrous cycle animal nutrition age weight Mukasa-Mugerwa, E. Mutiga, E.R. Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs |
| title | Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs |
| title_full | Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs |
| title_fullStr | Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs |
| title_full_unstemmed | Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs |
| title_short | Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs |
| title_sort | peripubertal plasma progesterone patterns in ethiopian menze ewe lambs |
| topic | tropics lambs menz ewe lambs sexual maturity progesterone oestrous cycle animal nutrition age weight |
| url | https://hdl.handle.net/10568/28860 |
| work_keys_str_mv | AT mukasamugerwae peripubertalplasmaprogesteronepatternsinethiopianmenzeewelambs AT mutigaer peripubertalplasmaprogesteronepatternsinethiopianmenzeewelambs |