Investigations on spermicidal activity in the sheep vagina

Hawk, H. W.; Conley, H.H.

doi:10.1016/0093-691x(75)90016-3

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…Such protocols are easy to use and cheaper than the conventional progestogen-eCG-based treatments which are expensive and non-available in many countries (Flores-Najera et al 2010). In addition, the intravaginal hormone-releasing device causes vaginal problems, such as vaginitis, the development of anti-eCG antibodies in repeatedly treated animals, which reduces fertility (Baril et al 1996;Roy et al 1999) and hampers sperm transport and viability (Hawk and Conley 1975). Coupled with the negative implications of progestogen residues in milk, the development of alternative methods of synchronizing estrus is of great importance (Lopez-Sebastian et al 2007).…”

Section: Introductionmentioning

confidence: 99%

The efficiency of estrus synchronization protocols and artificial insemination in the Abergelle goat on-station and on-farm conditions of Northern Ethiopia

Wondim

Alemayehu

Rouatbi

et al. 2022

Journal of Applied Animal Research

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This study was conducted to investigate the effect of different estrus synchronization protocols followed by artificial insemination on estrus response and the conception rate of Abergelle goats. Three estrus synchronization protocols: (i) the standard protocol associating progestogens, gonadotropins and prostaglandins (P 4 + eCG + PGF 2α ), (ii) single injection of prostaglandin (PGF S ), (iii) double injection of prostaglandin (PGF D ) were evaluated and compared to a control group that did not receive a hormonal treatment. Estrus behaviour was monitored in all does and those in estrus were inseminated. The estrous response was significantly higher in P 4 + eCG + PGF 2α does than in counterparts in PGF S and PGF D groups (p < 0.001). Results also revealed an earlier onset of estrus in the PGF D -treated group, a longer duration of estrus for second-and third-parity -does and an earlier onset of estrus in animals having a 3.5 body condition score. Even if the conception rate (CR) was highest when using the PGF D protocol, the lowest kidding rate (KR) was obtained when using this same treatment. The P 4 + eCG + PGF protocol yielded the highest litter size. Farmers' perception surveys revealed that a higher proportion of goat keepers used a controlled mating system and had culling practices and farmers selected PGF D as a preferred protocol.

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Section: Introductionmentioning

confidence: 99%

The efficiency of estrus synchronization protocols and artificial insemination in the Abergelle goat on-station and on-farm conditions of Northern Ethiopia

Wondim

Alemayehu

Rouatbi

et al. 2022

Journal of Applied Animal Research

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“…The European Union and many other countries control the usage of progestagens strictly through legislation (Maximum Residue Limits, RD 2178/2004) prohibiting the presence of residues in milk and meat (López-Sebastian et al, 2007). Intravaginal progestagens are really recognized to have negative effects on fertility, through affecting sperm transport and viability (Hawk and Conley, 1975).…”

Section: Advantages Of Substituting the Traditional Protocolmentioning

confidence: 99%

Open pulled straw vitrification of murine and caprine embryos and timed deep uterine insemination of goats

Yacoub¹

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I would like to express my faithfull and deepest gratitude to my supervisor Prof. Dr.Wolfgang Holtz for his continuous support, guidance, encouragement, patience and wisdom throughout my PhD study. I would also like to extend my sincere thankfulness to my cosupervisor Prof. Dr. Dr. Matthias Gauly for his constructive criticism and valuable guidance.Sincere thanks are also extended to Prof. Dr. Dr. Udo ter Meulen who kindly accepted to be my third examiner. I acknowledge DAAD for the three and half year's fellowship, which gave me the chance to finish my PhD successfully.I would like to extend my sincere appreciation to Mrs. Grete Thinggaard ter Meulen, scientific adviser to study affairs, for her help and guidance. Many thanks go to Dr. J.Heinzemann and Mrs. B. Lunderstaedt, coordinators of IPAG for their co-operation and valuable help.Many thanks go to the staff of the Department of Animal Science, namely MS Birgit Sohnrey,

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Effects of LH administration at the end of an FSH superovulatory regimen on ovulation rate and embryo production in three breeds of sheep

et al. 1996

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Investigations on spermicidal activity in the sheep vagina

Cited by 5 publications

References 8 publications

The efficiency of estrus synchronization protocols and artificial insemination in the Abergelle goat on-station and on-farm conditions of Northern Ethiopia

The efficiency of estrus synchronization protocols and artificial insemination in the Abergelle goat on-station and on-farm conditions of Northern Ethiopia

Open pulled straw vitrification of murine and caprine embryos and timed deep uterine insemination of goats

Effects of LH administration at the end of an FSH superovulatory regimen on ovulation rate and embryo production in three breeds of sheep

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