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Effects of hCG administration on accessory corpus luteum formation and progesterone production in estrous-induced nulliparous Santa Inês ewes. Repositório Alice
FONSECA, J. F. da; CASTRO, A. C. R.; ARASHIRO, E. K. N.; OLIVEIRA, M. E. F.; ZAMBRINI, F. N.; ESTEVES, L. V.; BRANDÃO, F. Z.; SOUZA-FABJAN, J. M. G..
Abstract: The effect of hCG administration on accessory corpus luteum (ACL) formation, CL area, and plasma progesterone (P4) concentration (ng/mL) seven days after breeding was studied in nulliparous Santa Inês sheep. Intravaginal 60 mg MAP sponges were inserted into ewes for six days and 300 IU eCG i.m. and 30 ?g d-cloprostenol latero-vulvar were administered 24 h before sponge removal. Ewes were naturally bred and, seven days after first mating (Day 0; D0), were treated with either 250 IU hCG (hCG group; n = 7) or 1 mL saline solution (control group; n = 7). Blood was collected to determine plasma P4 concentrations and sonograms were performed on Days 7, 10, 13, 16, 19, and 22. Number of CL on D7 was similar (P > 0.05) between hCG (1.3 ± 0.5) and...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Ultrasound; CL; Luteotropic effect; Ovulation induction; Taxa de concepção; Ovino; Corpo Lúteo; Progesterona; Ovulação; Ciclo Estral; Ultrassom; Reprodução Animal; Prenhez; Sheep; Corpus luteum; Progesterone; Brazil; Estrous cycle; Animal reproduction; Ewes; Conception rate; Pregnancy rate.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093405
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Porcine luteinising hormone given at oestrus onset by intramuscular route does not advance ovulation in gilts Ciência Rural
Ulguim,Rafael da Rosa; Sbardella,Pedro Ernesto; Fontana,Diogo Luiz; Moroni,Julia Linck; Pommerehn,Luiza; Bernardi,Mari Lourdes; Wentz,Ivo; Bortolozzo,Fernando Pandolfo.
This study aimed to evaluate the use of porcine luteinising hormone (pLH) given at oestrus onset in gilts to synchronise ovulation. A total of 120 gilts (40/treatment) were assigned in three treatments: control - application of placebo by intramuscular (i.m.) route at oestrus onset; pLH2.5 - application of 2.5mg of pLH by i.m. route at oestrus onset; pLH5 - application of 5mg of pLH by i.m. route at oestrus onset. On average, the interval onset of oestrus to ovulation did not differ (P>0.05) among treatments (control - 28.7±1.6h; pLH2.5 - 28.2±1.6h; pLH5 - 27.5±1.6h). The frequency distribution of gilts ovulated in different moments after oestrus detection was not affected (P>0.05) by the treatment. In conclusion, the use of 2.5mg or 5mg of pLH given...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ovulation induction; Swine reproduction; Reproductive biotechniques..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001001887
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Prostaglandin E2 induces ovulation in prepubertal mice. Repositório Alice
ANDRADE, J. de S.; ZULIAN, J. P.; SINGH, J.; SETÚBAL, S. da S.; SILVA, R. R. da; SCHNEIDER, A.; PFEIFER, L. F. M..
The objective of this study was to determine the ability of prostaglandin E2 (PGE2) to induce ovulation and expression of PGE2 receptor (EP2 and EP4) and COX genes (COX-1 and COX-2) in the ovary and pituitary of prepubertal mice. Thepositive control consisted of the application of 5 µg of gonadotropin-releasing hormone (GnRH, n = 29); the negativecontrol applied 0.5 mL of phosphate buffered saline (PBS, n=31); the treatment tested the application of 250 µg of PGE2 (n = 29), making a total of 89 prepubertal mice (BALB/c). Mice were euthanized 14 to 15 h after treatments to detectovulation and tissue collection. A Chi-square test was used to compare the proportion of animals ovulating. Geneexpressions and number of ovulation were analyzed by one-way ANOVA...
Tipo: Nota Técnica/Nota Científica (ALICE) Palavras-chave: Prepubertal mice; Prostagladina E2; Receptor PGE2; Camundongos pré-púberes; Ratones prepúberes; Ovulation induction; Inducción de la ovulación.; Ovulação; Prostaglandins..
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133952
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