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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
14/10/1998 |
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Data da última atualização: |
09/08/2023 |
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Autoria: |
MIEUSSET, R.; QUINTANA CASARES, P.; SANCHEZ PARTIDA, L. G.; SOWERBUTTS, S. F.; ZUPP, J. L.; SETCHELL, B. P. |
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Título: |
Effects of heating the testes and epididymides of rams by scrotal insulation on fertility and embryonic mortality in ewes inseminated with frozen semen. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Journal of Reproduction and Fertility, v. 94, n. 2, p. 337-343, Mar. 1992. |
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DOI: |
10.1530/jrf.0.0940337 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Fertilization rate and embryonic mortality were assessed in 636 ewes inseminated in each uterine horn with 50 x 10(6) frozen spermatozoa from four control rams and from four rams submitted to a moderate (1.4-2.2 degrees C), but repeated, intermittent (16 h/day for 21 consecutive days) increase in their subcutaneous scrotal temperature by means of scrotal insulation. Pregnancy was assessed twice in each ewe from concentration of progesterone in blood plasma at 17 days and by ultrasound at 65 days after insemination. No differences were observed in the pregnancy rate at 17 days between ewes inseminated with semen collected from control rams (56.0, 65.2, 66.7 and 60.3%) and from heated rams (60.6, 71.8, 63.6 and 48.2%) before or after 4, 15 and 21 days of heating, respectively. In contrast, the rate of embryonic mortality between 17 and 65 days after insemination was significantly higher at days 4, 15 and 21 in the heated rams (78.7, 78.6 and 93%) than in the control rams (55, 59 and 65.7%). These results indicate that an intermittent slight, but repeated, increase in the subcutaneous scrotal temperature could induce a significant increase in the embryonic mortality rate. As these changes were apparent on day 4 of heating, an effect must have occurred on sperm stored in the epididymis. |
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Palavras-Chave: |
Hot Temperature; Insulacao escrotal; Mortalidade embrionaria; Semen Preservation. |
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Thesagro: |
Fertilidade; Ovino. |
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Thesaurus Nal: |
Adverse effects; Cryopreservation; Embryonic mortality; Epididymis; Etiology; Female fertility; Fetal death; Male fertility; Physiology; Pregnancy; Reproduction; Scrotum; Sheep; Testes. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02586naa a2200433 a 4500
001 1523960
005 2023-08-09
008 1992 bl uuuu u00u1 u #d
024 7 $a10.1530/jrf.0.0940337$2DOI
100 1 $aMIEUSSET, R.
245 $aEffects of heating the testes and epididymides of rams by scrotal insulation on fertility and embryonic mortality in ewes inseminated with frozen semen.$h[electronic resource]
260 $c1992
520 $aAbstract: Fertilization rate and embryonic mortality were assessed in 636 ewes inseminated in each uterine horn with 50 x 10(6) frozen spermatozoa from four control rams and from four rams submitted to a moderate (1.4-2.2 degrees C), but repeated, intermittent (16 h/day for 21 consecutive days) increase in their subcutaneous scrotal temperature by means of scrotal insulation. Pregnancy was assessed twice in each ewe from concentration of progesterone in blood plasma at 17 days and by ultrasound at 65 days after insemination. No differences were observed in the pregnancy rate at 17 days between ewes inseminated with semen collected from control rams (56.0, 65.2, 66.7 and 60.3%) and from heated rams (60.6, 71.8, 63.6 and 48.2%) before or after 4, 15 and 21 days of heating, respectively. In contrast, the rate of embryonic mortality between 17 and 65 days after insemination was significantly higher at days 4, 15 and 21 in the heated rams (78.7, 78.6 and 93%) than in the control rams (55, 59 and 65.7%). These results indicate that an intermittent slight, but repeated, increase in the subcutaneous scrotal temperature could induce a significant increase in the embryonic mortality rate. As these changes were apparent on day 4 of heating, an effect must have occurred on sperm stored in the epididymis.
650 $aAdverse effects
650 $aCryopreservation
650 $aEmbryonic mortality
650 $aEpididymis
650 $aEtiology
650 $aFemale fertility
650 $aFetal death
650 $aMale fertility
650 $aPhysiology
650 $aPregnancy
650 $aReproduction
650 $aScrotum
650 $aSheep
650 $aTestes
650 $aFertilidade
650 $aOvino
653 $aHot Temperature
653 $aInsulacao escrotal
653 $aMortalidade embrionaria
653 $aSemen Preservation
700 1 $aQUINTANA CASARES, P.
700 1 $aSANCHEZ PARTIDA, L. G.
700 1 $aSOWERBUTTS, S. F.
700 1 $aZUPP, J. L.
700 1 $aSETCHELL, B. P.
773 $tJournal of Reproduction and Fertility$gv. 94, n. 2, p. 337-343, Mar. 1992.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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