Journal ArticleDOI
Intra-uterine insemination of ewes with frozen semen
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There have been a number of reports on the frozen storage of ram semen, and artificial insemination with frozen semen has been performed on an experimental basis in several countries.Abstract:
There have been a number of reports on the frozen storage of ram semen, and artificial insemination with frozen semen has been performed on an experimental basis in several countries. Intensive laboratory studies led to considerable progress regarding the freezing and thawing procedures (Salamon & Visser, 1972; Colas, 1975). However, fertility following insemination tends to be considerably lower than for fresh or chilled semen (Maxwell et al. 1980).read more
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Journal ArticleDOI
Frozen storage of ram semen II. Causes of low fertility after cervical insemination and methods of improvement
S. Salamon,W.M.C. Maxwell +1 more
TL;DR: At present satisfactory and reliable lambing results are only obtainable by using intrauterine insemination by laparoscopy, and the most effective method is to increase the depth of deposition of frozen-thawed semen into the cervical canal.
Journal ArticleDOI
Effects of heating the testes and epididymides of rams by scrotal insulation on fertility and embryonic mortality in ewes inseminated with frozen semen.
R. Mieusset,P. L. Quintana Casares,L. G. Sanchez Partida,S. F. Sowerbutts,J. L. Zupp,B. P. Setchell +5 more
TL;DR: The results indicate that an intermittent slight, but repeated, increase in the subcutaneous scrotal temperature could induce a significant increase inThe embryonic mortality rates of ewes inseminated with frozen spermatozoa.
Journal ArticleDOI
Artificial insemination of ewes with frozen-thawed semen at a synchronized oestrus. 1. Effect of time of onset of oestrus, ovulation and insemination on fertility
TL;DR: Ewes lambing and lambs born per ewe inseminated increased with time of insemination at 48, 60 and 72 h (linear, P) and egg fertilisation rates were not different between ewes irrespective of time of onset of oestrus or whether or not eWes were marked.
Journal ArticleDOI
Fertility and Its Relationship to Motility Characteristics of Spermatozoa in Ewes After Cervical, Transcervical, and Intrauterine Insemination With Frozen‐Thawed Ram Semen
TL;DR: Postthaw motility results from immediately after thawing and fertility results from experiments where intrauterine insemination was performed with semen frozen in proline- or glycine betaine-containing or HEPES- or Tris-based diluents were pooled and subjected to a pairwise correlation procedure.
Journal ArticleDOI
Artificial insemination of ewes with frozen-thawed semen at a synchronised oestrus. 2. Effect of dose of spermatozoa and site of intrauterine insemination on fertility
TL;DR: Although site of insemination did not affect the percentage of ewes lambing, thepercent of lambs born per ewe inseminated was higher afterInsemination in the middle of the uterine horn than at the other sites (P < 0.001).
References
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Journal ArticleDOI
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TL;DR: In this article, a reformulation of linear models is proposed to integrate finite and infinite populations, random and fixed effects, excess and deficit of variance, to avoid unnecessary constraints on parameters, and to lead naturally to interesting hypotheses about the model terms.
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Uterine insemination of ewes with the aid of a laparoscope
I. D. Killen,G. J. Caffery +1 more
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Effect of initial freezing temperature, addition of glycerol and dilution on the survival and fertilizing ability of deep-frozen ram semen
TL;DR: The semen frozen according to the best conditions had a fertilizing ability similar to that of "fresh" semen when the proportion of motile spermatozoa before, and after 1 or 3 hr of incubation was equal to or above 45, 40 and 30% respectively.
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Fertility of ram spermatozoa frozen by the pellet method. I. Transport and viability of spermatozoa within the genital tract of the ewe.
R. J. Lightfoot,S. Salamon +1 more
Journal ArticleDOI
Effect of composition of tris-based diluent and of thawing solution on survival of ram spermatozoa frozen by the pellet method.
S Salamon,D Visser +1 more
TL;DR: Six factorial experiments were conducted to examine the effects of effects of tris(hydroxymethyl)aminomethane (Tris) and type and concentration of sugar in the freezing diluent and of composition of thawing solution on the survival of ram spermatozoa following the freeze-thaw procedure.