Results 11 to 20 of about 505,274 (114)

Immunocontraception of male and female giraffes using the GnRH vaccine Improvac®. [PDF]

Zoo Biol, 2022
I Protocols for contraception using the GnRH vaccine Improvac® were developed. A clear reduction of fecal hormone metabolites in female giraffes was achieved with three, and in males with four or five injections at 4‐week intervals. Effective booster injections were administered at 2‐month intervals in the first, and at three to 4‐month intervals in ...
Schwarzenberger F, Krawinkel P, Jeserschek SM, Schauerte N, Geiger C, Balfanz F, Knauf-Witzens T, Sicks F, Martinez Nevado E, Anfray G, Hein A, Kaandorp-Huber C, Marcordes S, Venshøj B.   +13 more
europepmc   +3 more sources

Effects of an anti-gonadoliberin releasing hormone vaccine on testicular, epididymal and spermatogenic development in the horse. [PDF]

Reprod Domest Anim, 2022
Abstract The effects of the GnRH vaccine Improvac® on testicular and epididymal morphometrics, histology and spermatogenesis were measured in 19 young (15–20 months) colts randomly assigned to one control (saline, castration at 57 days, n = 6) or either of two GnRH vaccine‐treatment groups, T‐57 (castration at 57 days, n = 7) or T‐100 (castration at ...
Botha AE, Schulman ML, Birrell J, du Plessis L, Laver PN, Soley J, Colenbrander B, Bertschinger HJ.   +7 more
europepmc   +2 more sources

Advances in the ultrasound diagnosis in equine reproductive medicine: New approaches. [PDF]

Reprod Domest Anim, 2022
Abstract Ultrasound technology has led to new lines of research in equine reproduction, and it has helped to greatly improve clinical diagnosis and reproductive outcomes in equine practice. This review aims to discuss the potential clinical uses and new approaches of ultrasonography in equine reproduction.
Ortega-Ferrusola C, Gómez-Arrones V, Martín-Cano FE, Gil MC, Peña FJ, Gaitskell-Phillips G, Da Silva-Álvarez E.   +6 more
europepmc   +2 more sources

Immunocastration in adult boars as a model for late-onset hypogonadism. [PDF]

Andrology, 2022
Abstract Background While immunocastration has been studied in male pre‐pubertal pigs, data on older, sexually mature animals are limited. To understand the physiological effects of androgen deprivation in the late sexual development phase, we compared mature immunocastrated boars (n = 19; average age = 480 days) to young male immunocastrated pigs (n =
Batorek-Lukač N, Kress K, Čandek-Potokar M, Fazarinc G, Škrlep M, Poklukar K, Wesoly R, Stefanski V, Vrecl M.   +8 more
europepmc   +2 more sources

Early vaccination with Improvac®: effects on performance and behaviour of male pigs

Animal, 2012
The aim of this study was to investigate the effect of giving a two-dose regimen of gonadotropin-releasing hormone vaccine, Improvac® (Pfizer Ltd), earlier than currently recommended, on performance and behaviour of growing/finishing pigs.
K. Andersson, C. Brunius, G. Zamaratskaia, K. Lundström   +3 more
doaj   +2 more sources

GnRH-Based Immunocastration Vaccines: Comparative Analysis and Role in Boar Taint Reduction [PDF]

Vaccines
Boar taint is a persistent challenge in pork production, caused primarily by the accumulation of androstenone and skatole in adipose tissue. It affects 5–40% of uncastrated male pigs and is perceived negatively by a substantial proportion of consumers ...
Jisang Kim, Mariusz Skwarczynski, Rachel J. Stephenson   +2 more
doaj   +2 more sources

Effects of GnRH vaccination in wild and captive African Elephant bulls (Loxodonta africana) on reproductive organs and semen quality. [PDF]

PLoS ONE, 2017
Although the African elephant (Loxodonta africana) is classified as endangered by the International Union for Conservation of Nature (IUCN), in some isolated habitats in southern Africa, contraception is of major interest due to local overpopulation ...
Imke Lueders, Debbie Young, Liana Maree, Gerhard van der Horst, Ilse Luther, Stephan Botha, Brendan Tindall, Geoffrey Fosgate, André Ganswindt, Henk J Bertschinger   +9 more
doaj   +2 more sources

Effects of immunocastration and supplementary feeding level on the performance and blood biochemical markers of farmed yearling fallow deer (Dama dama)

Journal of Animal Physiology and Animal Nutrition, Volume 107, Issue 5, Page 1158-1166, September 2023., 2023
Abstract In cervids, blood biochemical markers may reflect changes in various physiological and environmental factors, especially in response to changes in metabolism following nutrient supplementation or the manipulation of hormone production. Decreasing androgen production through immunocastration (IC) to ease the husbandry of male animals is ...
Veit Ny, Tersia Needham, Luděk Bartoň, Daniel Bureš, Radim Kotrba, Abubakar S. Musa, Francisco Ceacero   +6 more
wiley   +1 more source

[Oestrus suppression in a dairy herd by means of anti-GnRH vaccination Improvac®: A prospective field study]. [PDF]

, 2020
INTRODUCTION The aim of this study was to evaluate the duration of estrus suppression after a double administration of the anti-GnRH vaccine Improvac® (Zoetis Schweiz GmbH, 2800 Delémont) in cows.
Hirsbrunner, Gabriela, Studer, Eveline, Schmid, Robin Michael   +2 more
core   +2 more sources

Suppression of reproductive behaviour and gonadal function in female horses—An update

Reproduction in Domestic Animals, Volume 57, Issue S4, Page 4-12, September 2022., 2022
Abstract The behaviour of mares is often detrimental to their performance resulting in frequent demand for methods to suppress gonadal function. In addition, prevention of unintended reproduction especially in feral horse populations may require methods for suppression of gonadal function.
Christine Aurich, Martim Kaps
wiley   +1 more source