Suppression of estrus in cats with melatonin implants

Gimenez, Fernanda; Stornelli, María Alejandra; Tittarelli, Claudia Marcela; Savignone, C.A.; Dorna, I. Videla; Sota, Rodolfo Luzbel de la

doi:10.1016/j.theriogenology.2009.04.004

Cited by 30 publications

(70 citation statements)

References 39 publications

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“…Animals were maintained in a controlled environment with artificial lighting (Giménez et al. ). All males were fertile as they had fathered litters before the start of this experiment.…”

Section: Methodsmentioning

confidence: 99%

“…All males were housed alone in stainless steel cages and were fed with commercial cat food (Fit 32 ® ; Royal Cannin, Buenos Aires, Argentina) and water ad libitum. Animals were maintained in a controlled environment with artificial lighting (Gime´nez et al 2009). All males were fertile as they had fathered litters before the start of this experiment.…”

Section: Methodsmentioning

confidence: 99%

“…Additionally, some new studies also suggest seasonality of sperm production in tomcat (Blottner and Jewgenow 2007;Stornelli et al 2009). In very recent studies, an artificial long photoperiod (LP) (12 h light-12 h dark) has been used as a model to assess the effects of melatonin implants to suppress oestrus in the queen (Gime´nez et al 2009). In one previous study, a potential refractoriness to LP was observed in tomcats being subjected for 18 months to a LP (R Nun˜ez Favre et al, unpublished observations).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Refractoriness to Long Photoperiod on Sperm Production and Quality in Tomcats

Favre

Bonaura

Tittarelli

et al. 2012

Reprod Domestic Animals

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ContentsThe aim of this study was to assess whether refractoriness to long photoperiod (LP) could be reversed by subjecting tomcats to a period of short days. Our hypothesis was that photoperiod changes can avoid refractoriness and restore sperm quality and production to that before refractoriness. Tomcats (n = 6) were housed in a conditioned room with LP (12L: 12D) for 45 days of acclimation and then maintained under LP for 18 month. Then, tomcats were changed to a period of decreasing light at a rate of 8 min/day for 1 month. Tomcats stayed for 1 month with short photoperiod (SP; 8L: 16D) and then were switched back to a period of increasing light at a rate of 8 min/day for 1 month. The experiment was completed after tomcats remained in LP for 2 months. Toms were anaesthetized and semen samples were collected by electroejaculation every 2 weeks. Sperm parameters were evaluated in all ejaculates, and data were analysed by ANOVA. Motility, velocity, volume, sperm concentration, total sperm count, viability, acrosome integrity, plasma membrane integrity and sperm morphology were higher during LP compared with a refractory LP (p < 0.01). Likewise, velocity, viability, acrosome integrity, plasma membrane integrity and sperm morphology were higher in a LP compared with a SP (p < 0.05). On the other hand, motility, volume, concentration and total sperm count were similar between LP and SP (p > 0.20).Whereas motility, velocity, viability, acrosome integrity and plasma membrane integrity were similar in a refractory LP compared with SP (p > 0.05), volume, sperm concentration, total sperm count and sperm morphology were lower in a refractory LP compared with SP (p < 0.05). In conclusion, refractoriness and reduced sperm production and quality induced by a prolonged LP of 18 month can be restored after placing tomcats to a SP.

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“…Animals were maintained in a controlled environment with artificial lighting (Giménez et al. ). All males were fertile as they had fathered litters before the start of this experiment.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Refractoriness to Long Photoperiod on Sperm Production and Quality in Tomcats

Favre

Bonaura

Tittarelli

et al. 2012

Reprod Domestic Animals

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“…So, further studies were conducted showing that the use of the melatonin implant is a promising option for short‐term post‐ponement of oestrus, while preserving the future reproductive potential (Gimenez et al. ; Faya et al. ), but not to delay puberty (Faya et al.…”

Section: Melatoninmentioning

confidence: 99%

“…The duration of efficacy seemed to depend on the stage of oestrous cycle when animals were treated with a prolonged duration of efficacy in interoestrus compared with oestrus (113.3 ± 6.1 vs. 61.1 ± 6.8 days) (Gimenez et al. ). In a more recent study, Faya et al.…”

Section: Melatoninmentioning

confidence: 99%

Suppression of Fertility in Adult Cats

Goericke-Pesch

Wehrend

Georgiev

2014

Reprod Domestic Animals

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Contents Cats are animals with highly efficient reproduction, clearly pointing to a need for suppression of fertility. Although surgical contraception is highly effective, it is not always the method of choice. This is predominantly because it is cost‐intensive, time‐consuming and irreversible, with the latter being of major importance for cat breeders. This article reviews the use of progestins, scleroting agents, immunocontraception, melatonin, GnRH antagonists and finally, GnRH agonists, in adult male and female cats in detail, according to the present state of the art. By now, various scientific and clinical options are available for the suppression of fertility in adult cats and the decision as to which should be chosen – independent of the legal registration of any state – depends on different facts: (i) feral or privately owned animal? (ii) temporary or permanent suppression of fertility wanted/needed? (iii) sex of the animal? New effective and available methods for hormonal contraception include melatonin implants for short‐term post ponement of oestrus in adult queens and slow‐release GnRH‐agonist implants containing deslorelin (Suprelorin®) for short‐ and long‐term contraception in male and female companion and breeding cats.

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Control of Reproduction

Little

2025

The Cat

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Suppression of estrus in cats with melatonin implants

Cited by 30 publications

References 39 publications

Effect of Refractoriness to Long Photoperiod on Sperm Production and Quality in Tomcats

Effect of Refractoriness to Long Photoperiod on Sperm Production and Quality in Tomcats

Suppression of Fertility in Adult Cats

Control of Reproduction

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