Influence d'une sous-alimentation de la vache allaitante sur l'induction de l'ovulation par l'hormone gonadotrope sérique (PMSG) au cours du post-partum
| Autor: | P. Mauléon, D. Gauthier, J. Cochaud, A. Yaouanc |
|---|---|
| Přispěvatelé: | Revues Inra, Import |
| Rok vydání: | 1981 |
| Předmět: |
Embryology
medicine.medical_specialty media_common.quotation_subject Medicine (miscellaneous) Ovary chemistry.chemical_compound Animal science Lactation Internal medicine [SDV.BDD] Life Sciences [q-bio]/Development Biology medicine Ovulation [SDV.BDLR] Life Sciences [q-bio]/Reproductive Biology reproductive and urinary physiology media_common Pregnancy business.industry Norgestomet medicine.disease [SDV.AEN] Life Sciences [q-bio]/Food and Nutrition Endocrinology medicine.anatomical_structure Reproductive Medicine chemistry Animal Science and Zoology business Postpartum period Developmental Biology Food Science |
| Zdroj: | Reproduction Nutrition Développement. 21:577-583 |
| ISSN: | 0181-1916 |
| Popis: | Two experiments were carried out to assess the influence of undernutrition on postpartum ovulation in nursing Charolais cows after PMSG injection. In each experiment, the nursing cows were divided into 2 groups: one fed at a low nutritional level and the other at a normal nutritional level. In the first experiment, 19 animals were injected on post-partum days 15 and 30 with 600 IU of PMSG; in the second experiment, 34 received the same injection on post-partum day 54 after 9 days of priming with a Norgestomet implant. On post-partum day 15, only one cow in each group ovulated. At post-partum day 30, 1 out of 8 cows at the low nutritional plane ovulated vs 5 out of 9 at the normal nutritional plane (P less than 0.05). Likewise, on post-partum day 54, 5 out of 14 cows at the low nutritional plane ovulated vs 17 out of 17 at the normal nutritional level (P less than 0.05). Therefore, there is a time during the post-partum period when the nursing cow ovary does not respond to PMSG by ovulation. The length of this time is increased by undernutrition. |
| Databáze: | OpenAIRE |
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