Journal ArticleDOI
The use of synthetic gonadotropin releasing hormone treatment in the collection of sheep embryos.
TLDR
It is concluded that fertilization failure, a major problem in sheep embryo collection, can be eliminated through judicious use of GnRH treatment and properly timed intrauterine insemination.About:
This article is published in Theriogenology.The article was published on 1989-04-01. It has received 50 citations till now. The article focuses on the topics: Insemination & Ovulation.read more
Citations
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Journal ArticleDOI
Storage of ram semen.
S. Salamon,W.M.C. Maxwell +1 more
TL;DR: Factors influencing the fertility of stored semen and methods used for improvement are discussed, and fertility results of long-term frozen stored ram semen are given.
Journal ArticleDOI
Current status of embryo technologies in sheep and goat.
TL;DR: The recent improvements of embryo production and freezing technologies could be used for constitution of flocks without risks of disease transmission and will allow wider propagation of valuable genes in small ruminants populations in the future.
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
State of the art in sheep-goat embryo transfer.
TL;DR: A better comprehension of the relationships between oocyte quality and follicular characteristics after superovulation can be gained using in vitro techniques, which will subsequently be used for the optimization of embryo production needed for the genetic improvement of livestock and the development of new biotechnologies.
Journal ArticleDOI
Development of ovine embryos in synthetic oviductal fluid containing amino acids at oviductal fluid concentrations.
TL;DR: SOF containing oviductal fluid concentrations of amino acid facilitates the development of a high percentage of blastocysts and improves embryo morphology compared with that observed in medium containing HS, which significantly improves hatching rates compared with those obtained in SOF containing commercially available preparations of amino acids.
References
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Journal ArticleDOI
Uterine insemination of ewes with the aid of a laparoscope
I. D. Killen,G. J. Caffery +1 more
Journal ArticleDOI
Reduction of sperm transport in ewes by superovulation treatments.
G. Evans,D. T. Armstrong +1 more
TL;DR: Within the synchronized ewes, PMSG and FSH resulted in an equivalent superovulatory response, but there was a marked reduction in sperm recovery when compared with unstimulated animals, with the greatest reduction attributable to PMSG treatment.
Journal ArticleDOI
Constancy of Interval Between Luteinizing Hormone Release and Ovulation in the Ewe
TL;DR: The constancy of the interval between LH release and ovulation in these experiments confirms the importance of the role of LH in the ovulatory physiology.
Journal ArticleDOI
Intrauterine insemination enhances fertility of frozen semen in superovulated ewes.
D. T. Armstrong,G. Evans +1 more
TL;DR: Superovulated ewes were inseminated with fresh or frozen semen in a factorial experiment which compared two techniques of artificial insemination; i.e. conventional cervical deposition and intrauterine deposition at laparoscopy.
Journal ArticleDOI
Timing of multiple ovulations in the ewe after treatment with FSH or PMSG with and without GnRH
TL;DR: It is suggested that the use of GnRH in embryo collection programmes appears justified and is likely to improve embryo yields due to improved rates of fertilization.