commercialisée par les laboratoires Virbac. Je crois que ceux qui l'utilisent se la procurent à l'étranger.
J'ai eu quelques difficultés à trouver les infos, mais je connais des éleveurs qui l'ont utilisé, il en existe plusieurs (Suprelorin, Melatonine ...) et de durées d'efficacité différentes.
C'est exactement la même molécule que pour les mâles.
La molécule est la suprelorine ou deslorelin, elle est utilisée en médecine vétérinaire depuis 15 ans à l'étranger. Ce n'est pas une hormone, donc ca n'a pas d'effet secondaires comme la pilule, c'est un inhibiteur de production hormonal, la chatte est comme stérilisée pendant environ 9-12 mois (moins que pour le mâle).
L'implant est utilisé non seulement pour les mâles mais sur les femelles aussi et apparemment ça marche même mieux que pour les mâles.
Depuis 2001, des études ont été réalisées et sembleraient démontrer leur innocuité.
Désolée en anglais, si quelqu'un veut s'y coller
Je peux essayer de traduire, mais je risque de faire des erreurs...
The aim of this study was to develop a method for long-term but reversible inhibition of oestrous cycles in female cats by downregulation of GnRH receptors with deslorelin released from a long-acting implant. In a blind study with mature cats (n = 20), a 6 mg deslorelin implant was administered s.c. to ten cats and a placebo implant was administered to ten cats. Occurrence of oestrus and general health were observed daily, and individual faecal samples were collected at 3 day intervals for 14 months and analysed for oestradiol content. All the placebo-treated queens continued to undergo normal oestrous cycles during the study. Oestrus was accompanied by peaks in oestradiol concentrations of > or = 20 ng g-1 faeces. Treatment with deslorelin initially stimulated oestradiol release, which accompanied treatment-induced ovulations. Thereafter, oestradiol concentrations decreased to 1-10 ng g-1 faeces and remained low for extended periods. Observations of small increases in oestradiol concentrations in one cat led to a second treatment with 6 mg deslorelin in five cats on day 155 after first treatment. Faecal oestradiol concentrations remained < 20 ng g-1 faeces in the five single treatment cats for 8.0, 8.5, 11.0 and 14.0 (two cats) months. Cats receiving two implants had the first oestradiol peak > 20 ng g-1 faeces after treatment at 7.5, 11.0 (two cats), 11.5 and 14.0 months. After 14 months, two cats had returned to normal cyclic activity, two had irregular small oestrogen peaks and six showed no cyclic activity. For months 2-5, 6-10 and 11-14, oestrogen values in treated cats were significantly different from control values (P < 0.001, 0.05 and 0.02, respectively). Differences in oestrogen concentration between control cats and cats that were treated twice were significant (P < 0.001) during months 6-10 only. The general health of treated cats was unchanged throughout the study. These results confirm that deslorelin can effectively suppress ovarian activity in domestic cats, but that the duration of suppression varies among individuals.
J Reprod Fertil Suppl. 2001;57:269-73.
Efficacy of the GnRH analogue deslorelin for suppression of oestrous cycles in cats.
Munson L, Bauman JE, Asa CS, Jöchle W, Trigg TE.
Source
Dept VM-PMI, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
Abstract