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- W2034972950 abstract "The aim of these experiments was to study the effects of different methods of washing and selection of spermatozoa on the IVF of IVM oocytes from prepubertal goats. Fresh ejaculates from 3 males of proven fertility were processed according to the following treatments: 1) centrifugation in TALP, 2) centrifugation in sucrose-based Ficoll medium, 3) centrifugation in Percoll gradients at 40 and 80%, 4) by swim-up and 5) by dilution of spermatozoa (1:40) in (1:1) TALP. In all 5 treatments spermatozoa were incubated for 45 min with 100 microg/mL of heparin and then added to Fert-TALP. Oocytes were matured for 27 h in TCM-199 supplemented with 20% estrous goat serum (EGS), FSH, LH and estradiol-17beta. Spermatozoa (4x10(6) cells/mL) were coincubated with oocytes in 100 microL of Fert-TALP with hypotaurine for 24 h, after which the oocytes were transferred to a granulosa cells monolayer in TCM-199 plus 10% of EGS for 24 h (48 h post insemination). At 17 h post insemination a sample of sperm-exposed oocytes was taken and stained in lacmoid to observe sperm penetration and the formation of pronuclei. At 48 h post insemination the cleavage rate of oocytes was evaluated. Motility, viability and acrosome status of the spermatozoa were evaluated immediately after the mixing of the ejaculates, after washing and selection treatments, and after incubation with heparin and at 17 h post insemination. The different ejaculate treatments did not affect the penetration and cleavage rates of oocytes. At 48 h post insemination the cleavage rate was 46.9, 36.6 and 29.0% for dilution, Ficoll and swim-up preparations, respectively. Only the swim-up protocol improved sperm motility and viability compared with that of the initial semen sample and with the other sample treatments. At 17 h post insemination the semen parameters were the same for all sperm sample treatments." @default.
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- W2034972950 date "1999-04-01" @default.
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- W2034972950 title "Effect of semen preparation on IVF of prepubertal goat oocytes" @default.
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- W2034972950 doi "https://doi.org/10.1016/s0093-691x(99)00039-4" @default.
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