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| Registros recuperados: 11 | |
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| Cruz,Maria Helena Coelho; Saraiva,Naiara Zoccal; Cruz,Jurandir Ferreira da; Oliveira,Clara Slade; Del Collado,Maite; Fernandes,Hugo; Castro,Fernanda Cavallari de; Garcia,Joaquim Mansano. |
| This study evaluated the influence of follicular fluid (FF) added to the maturation medium on the quality of bovine embryos produced in vitro. In the first experiment, oocytes were matured in media containing five different FF concentrations with different maturation times and classified according to meiotic progression and migration of cortical granules. In the second experiment, oocytes matured in the same media were fertilized at three different maturation times; thereafter, cleavage and blastocyst rates were evaluated. In the third experiment, oocytes were matured in media containing three different FF concentrations at two different maturation times, and embryo quality, inferred by the ratio of inner cell mass and trophectoderm cells compared with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryo development; Inner cell mass; In vitro fertilization; Oocytes. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000300003 |
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| Quetglas,M.D.; Coelho,L.A.; Garcia,J.M.; Oliveira Filho,E.B.; Esper,C.R.. |
| The effects of insulin-like growth factor-I (IGF-I) on in vitro maturation (IVM) (experiment I) and on in vitro embryo development (experiment II) of bovine oocytes fertilized in vitro, were evaluated in terms of cleavage (CR), blastocyst (BR) and hatching (HR) rates. For IVM, immature cumulus-oocyte complexes were cultured in TCM-199 medium supplemented with Hepes, sodium bicarbonate, sodium pyruvate, additives, fetal calf serum (B-199 medium) and gonadotropins (14 U/ml PMSG and 7 U/ml hCG). For embryo development, the oocytes/zygotes were cultured in B-199 medium with bovine oviduct epithelial cells in suspension under silicon oil. Treatments for in vitro culture conditions for both experiments were: 1- B-199 + 200 ng/ml IGF-I; 2- B-199 + 100 ng/ml... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bovine; Cleavage rate; IGF-I; In vitro maturation; In vitro fertilization. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352001000200014 |
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| Costa,L.O.B.; Mendes,M.C.; Ferriani,R.A.; Moura,M.D.; Reis,R.M.; Silva de Sá,M.F.. |
| The objective of the present study was to examine the association between follicular fluid (FF) steroid concentration and oocyte maturity and fertilization rates. Seventeen infertile patients were submitted to ovulation induction with urinary human follicle-stimulating hormone, human menopausal gonadotropin and human chorionic gonadotropin (hCG). A total of 107 follicles were aspirated after hCG administration, the oocytes were analyzed for maturity and 81 of them were incubated and inseminated in vitro. Progesterone, estradiol (E2), estrone, androstenedione, and testosterone were measured in the FF. E2 and testosterone levels were significantly higher in FF containing immature oocytes (median = 618.2 and 16 ng/ml, respectively) than in FF containing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Steroid in follicular fluid; Maturity of oocytes; In vitro fertilization. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001100021 |
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| Moraes,G.V.; Azevedo,J.R.; Carneiro,T.C.; Cavalieri,F.L.B.; Mataveli,M.; Rossi,R.M.; Santos,T.C.. |
| The effects of selenium (Se) in Jersey cows' diet on the aspiration of oocytes and production of embryos in vitro were studied. Groups with five Jersey cows received 3.2mg or 9.6mg Se daily, provided in the feed concentrate. Six follicular aspirations were carried out every 15 days, using only the last 5. The oocytes were classified, and standard procedures were carried out for maturation, fertilization and cultivation. The total number of oocytes (35.11±2.65 vs 23.10±2.16) and degree 1 oocytes (11.61±2.65 vs 4.75±0.97) were higher in the group that received 9.6mg Se and the quantity of naked oocytes (3.23±0.87 vs 6.22±1.18) was lower in this group. The aspirated oocytes from the cows treated with 9.6mg Se/day resulted in higher (P<0.05) embryo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle dairy; Antioxidant; Glutathione peroxidase; In vitro fertilization; Oocyte quality. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000400001 |
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| Beirão, José; Boulais, Myrina; Gallego, Victor; O’brien, Justine K.; Peixoto, Silvio; Robeck, Todd R.; Cabrita, Elsa. |
| Artificial reproduction involves collection and handling of gametes in a way that secures their quality and maximizes the fertilization outcome. In addition to initial sperm quality, numerous steps can affect the final result of fertilization, from the sperm collection process until gamete mixing (or co-incubation) when spermatozoon enters or fuses with the oocyte. In this review, we summarize the whole process of sperm handling, from collection until fertilization for fish, penaeid shrimp, bivalve mollusks and marine mammals. To obtain sperm from captive animals, techniques vary widely across taxa, and include stripping by abdominal massage or testis surgical removal in fish, spermatophore collection in penaeid shrimps, gonadal scarification or... |
| Tipo: Text |
Palavras-chave: Sperm extraction; Spermatozoa:oocyte ratio; In vitro fertilization; In vitro reproduction; Assisted reproduction. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00492/60411/63847.pdf |
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| Registros recuperados: 11 | |
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