231 SUPEROVULATORY RESPONSE AND EMBRYO YIELD OF SANTA INES EWES SUBMITTED TO FOLLICLE STIMULATING HORMONE TREATMENTS STARTED NEAR THE TIME OF EMERGENCE OF THE FIRST AND LAST FOLLICULAR WAVE OF A PROGESTERONE-BASED PROTOCOL
Notice bibliographique
Résumé
This study was designed to investigate if the superovulatory response and embryo yield in Santa Ines ewes are influenced by the time that FSH treatments are inititiated: near the emergence of the first or last follicular wave of a progesterone-based (P4) protocol. Days of emergence of the follicular waves was defined in a previous study that evaluated follicular dynamics in oestrus synchronization treatments (Oliveira et al. 2011 Acta Sci. Vet.40). Twenty Santa Ines cyclic ewes were submitted to 2 superovulatory protocols according to the time that FSH treatments were initiated (G-first wave, n = 10 and G-last wave, n = 10). Thus, the FSH treatment started on Day 4 and 10 of protocol for G-first and G-last, respectively (Day 0 = onset of protocol). Ewes were treated with a P4 device (CIDR®; Pfizer-New Zealand) for 6 and 12 days for G-first and G-last, respectively. Additionally, in G-last, the CIDR was replaced by a new one on Day 7. All ewes received 2 injections of 37.5 µg of D-cloprostenol (Prolise®, Arsa-Argentina) on Day 0 and at CIDR removal. The superovulatory regimen consisted of 8 IM injections of pFSH (Folltropin®; Bioniche Animal Health, Belleville, Ontario, Canada) administrated twice daily (40, 40, 30, 30, 20, 20, 10 and 10 mg of porcine FSH). A single IM dose of 200 IU of eCG (Novormon®, Syntex, Buenos Aires, Argentina) was given concurrently with CIDR removal. Ewes were mated by a fertile ram. Embryo collections were accomplished 7 days after CIDR removal. The superovulatory response was classified in scores: (0) 4 or fewer corpora lutea (CL); (1) between 5 and 10 CL and (2) 11 or more CL. Means (± SD) were compared using Kruskal-Wallis test and percentages using Chi-square (P < 0.05). Most donors (70%, 7/10) from G-last had a superovulatory response classified as score 2 and the remainder (30%, 3/10) as score 1, whereas half of ewes from G-first were classified as score 2 and half as score 1 (P > 0.05).There was no effect between treatments (P > 0.05) for ovulation rate (G-first: 90.7 ± 10.2% vs G-last: 93.0 ± 7.2%), number of ovulations (G-first: 13.1 ± 7.3 vs G-last: 14.0 ± 5.8), or number of luteinized unovulated follicles (G-first: 1.4 ± 1.3 vs G-last: 0.9 ± 1.0). Furthermore, there was no effect between G-first and G-last (P > 0.05) in the rate of ova/embryos recovered (55.1 ± 27.1% vs 67.0 ± 19.4%), mean number of ova/embryos recovered (7.0 ± 5.5 vs 9.1 ± 3.8), number of viable embryos (3.9 ± 6.1 vs 5.7 ± 4.4), or viability rate (49.1 ± 43.7 vs 58.5 ± 34.6). In conclusion, superovulatory response and embryo yield did not differ between FSH treatments initiated during the first or last follicular wave of a progesterone-based treatment in Santa Ines ewes. Financial support of FAPESP is acknowledged.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».