A comparison of the changes in LH, FSH and testosterone in spring-born ram lambs of two different breeds
| Autor: | M. Terqui, P. Orgeur, Christine Perreau, Marie-Thérèse HOCHEREAU-de Reviers, M. R. Blanc, J. Pelletier, E. Lafortune |
|---|---|
| Přispěvatelé: | Revues Inra, Import |
| Rok vydání: | 1984 |
| Předmět: |
Male
Embryology medicine.medical_specialty medicine.drug_class Medicine (miscellaneous) Biology Reproductive cycle Fsh levels 03 medical and health sciences Species Specificity Internal medicine [SDV.BDD] Life Sciences [q-bio]/Development Biology medicine Animals Testosterone [SDV.BDD]Life Sciences [q-bio]/Development Biology [SDV.BDLR] Life Sciences [q-bio]/Reproductive Biology ComputingMilieux_MISCELLANEOUS 030304 developmental biology 0303 health sciences Sheep 0402 animal and dairy science Age Factors Testosterone (patch) [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology 04 agricultural and veterinary sciences Luteinizing Hormone Androgen 040201 dairy & animal science [SDV.AEN] Life Sciences [q-bio]/Food and Nutrition Endocrinology Reproductive Medicine Animal Science and Zoology Seasons Gonadotropin Follicle Stimulating Hormone [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition Developmental Biology Food Science |
| Zdroj: | Reproduction Nutrition Développement Reproduction Nutrition Développement, 1984, 24 (6), pp.947-952 |
| ISSN: | 0181-1916 |
| Popis: | LH, FSH and testosterone variations were compared during the prepubertal period in Romanov and Ile-de-France ram lambs born in the spring. Mean plasma LH levels increased significantly between the 1st and 8th week of age in the Romanov and between the 1st and 12th week of age in the Ile-de-France. At 1 month of age, the number of LH and testosterone pulses per hour was higher in Romanov than in Ile-de-France lambs. The mean plasma testosterone levels, higher in the Romanov, increased from 1 week of age onwards. Mean plasma FSH levels increased from the first neonatal week till the 8th week in the Romanov and till the 12th week in the Ile-de-France. The levels of FSH did not differ significantly between the two breeds. The higher and earlier secretion of LH and production of testosterone in the Romanov might be a cause of its better reproductive performance. |
| Databáze: | OpenAIRE |
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