Vaginal cytology after induction of ovulation in the queen: comparison of postoestrus and dioestrus

Kanca, Halit; Karakaş, Kübra; Dalgic, MA; Salar, Seçkin; Izgür, Hakkı

doi:10.1111/avj.12146

Cited by 15 publications

(18 citation statements)

References 10 publications

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“…In one study, induction of ovulation with hCG lead to disruption of oviductal embryo transport and development, probably due to abnormal endocrine environment [ 18 ], although successful ovulation was induced in queens in non-breeding season by administration of eCG and hCG before embryo transfer in the study of the team of Tsutsui [ 19 ]. Induction of ovulation can also be performed with GnRH in combination with vaginal stimulations [ 20 ].…”

Section: Mating Problems and Ovulation Disordersmentioning

confidence: 99%

Infertility in purebred cats – A review of the potential causes

2020

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Although purebred cat breeding is growing in popularity in European countries, most research and publications concern dog reproduction. Infertility in queens has been poorly studied. It may not come as a surprise as common domestic shorthair cats are well known for their excellent fertility. However, even in the latter, the infertility rate is around 20%. Only recently, published articles have analyzed the reproductive performances in different breeds, for example in UK, Sweden, France and Italy, and found similar figures. In cats, infertility may arise from many factors such as mismating, prolonged anestrus or silent heats, hormonal, nutritional, genetical or chromosomal causes. Also, infectious diseases, probably frequent in breeding facilities, include pathological agents that are well recognized as having a negative effect on pregnancy or other pathogens for which the involvement in fertility problems is unclear. However, analyzing the literature, it appears that the most prevalent causes of infertility in pedigree cats may well be, in females, uterine pathology (sub-clinical endometritis, cystic endometrial hyperplasia, or mucometra), and in males, teratospermia, which may be “permanent” and linked to reduced heterozygosity or “transient” in tomcats that present normal quantitative spermatogenic parameters. The influence of the breed is unknown. There is an urgent need to study the origin of infertility in purebred cats in order to improve the diagnosis and to develop treatments that may restore normal fertility in subfertile or infertile animals.

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Section: Mating Problems and Ovulation Disordersmentioning

confidence: 99%

Infertility in purebred cats – A review of the potential causes

2020

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“…A citologia vaginal demonstra a partir de uma análise subjetiva, a morfologia das células do epitélio vaginal, mediante a variação hormonal presente no decorrer do ciclo estral (KANCA et al, 2014;SOLANO-GALEGO;MASSERDOTTI, 2016).…”

Section: Estimativa Do Ciclo Estral Por Citologia Vaginalunclassified

Morfofisiologia Ovariana Das Cadelas

Zoppei¹,

Neto²,

Oliveira³

et al. 2019

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RESUMO As cadelas são monoestrais, poliovulatórias e não sazonais, cujo ciclo estral é regulado por mecanismos de feedback entre neurônios e células secretoras do eixo reprodutivo (Hipotálamo-Hipófise-Ovários). Seus ovários são formandos pela migração das células germinativas até a crista gonadal, povoando os cordões sexuais, que contribuem como células foliculares (Células da Granulosa), que envolvem o oócito, diferenciando-se em Células do Cumulus. Adicionalmente, há as Células da Teca que se desenvolvem em camadas internas e externas. Os folículos permanecem na camada cortical, enquanto que na medular há tecido conjuntivo, nervos e vasos sanguíneos. No pico de Hormônio Luteinizante ocorre a liberação do oócito (ovulação), enquanto que a folículogenese é estimulada pelo Hormônio Folículo Estimulante. Diferentemente de outros mamíferos, a oogênese das cadelas ocorre até dois meses após seu nascimento, pois há células em proliferação na região cortical do ovário, observando um aumento importante dos grânulos lipídicos, resultando em uma aparência escura ao oócito, e apresenta ainda folículos polioocitários, que diminuem durante a senilidade. O aumento das concentrações séricas de Estradiol folicular culmina em alterações de comportamento das cadelas no estro, cujas fases do ciclo estral poderiam ser detectadas pela citologia vaginal. Concluí-se que o conhecimento da anátomo fisiologia dos órgãos reprodutivos das cadelas, bem como a interação endócrina para o controle do ciclo estral, é importante para o manejo reprodutivo eficiente, para o controle da superpopulação canina, para o uso correto de biotécnicas e/ou controle de enfermidades reprodutivas. PALAVRAS-CHAVE: Ciclo estral; Ovário; Reprodução canina.

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“…In a prospective study of 15 queens that were showing behavioural oestrus, ovulation was induced in 7 (dioestrus group) and 8 were left untreated (postoestrus group). 4 Vaginal smears were collected from all animals before they were ovariohysterectomised on day 7. Digital images of 50 representative cells were measured using image analysis software.…”

Section: Small Animalsmentioning

confidence: 99%

“…The study design of interviewing 370 producers is a significant advance over the previous study in 2007 commissioned by the same authors that was based predominantly on expert opinion. 4 A proportion of the interviewees demonstrated at least a basic knowledge of biosecurity, with 45% not introducing any pigs onto their farm and 12% maintaining closed herds. The pig industry was found to fall broadly into two categories: larger farms that were vertically integrated, purchased semen to introduce new genetic material and did not market through saleyards and smaller producers that regularly used saleyards to both purchase and sell pigs.…”

Section: Editorial Emergency Disease Planning and Preparednessmentioning

confidence: 99%