Evaluation of feline uterine and umbilical arteries blood flow in a pharmacologically induced abnormal gestation model

Blanco, Paula Graciela; Vercellini, Rosario; Rube, A.; Rodríguez, Raúl Ricardo; Arias, Daniel Osvaldo; Gobello, Cristina

doi:10.1016/j.theriogenology.2016.07.028

Cited by 11 publications

(10 citation statements)

References 30 publications

(39 reference statements)

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“…In one study, pregnancy arrest was induced in queens by using the anti-progestine aglepristone. Authors observed an abnoemal increase in the resistancy index of the uterine artery together with the embryonic death [ 28 ]. But to the best of our knowledge no such measures have been published in field pathological conditions.…”

Section: Uterine Pathology: An Under-estimated Cause Of Infertility?mentioning

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: Uterine Pathology: An Under-estimated Cause Of Infertility?mentioning

confidence: 99%

Infertility in purebred cats – A review of the potential causes

2020

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“…Conversely, it was shown that feline abortion is preceded by an increase in RI due to uterine and umbilical blood flow impairment (Blanco et al., ).…”

Section: Introductionmentioning

confidence: 99%

Uterine two‐dimensional and Doppler ultrasonographic evaluation of feline pyometra

Blanco

Rube

Merlo

et al. 2018

Reprod Domestic Animals

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Contents The aim of this study was to compare uterine two‐dimensional and Doppler ultrasonographic parameters in queens suffering from pyometra from those in early pregnancy. Secondly, the effect of the presence of clinical signs of systemic illness on these parameters was also described. Fourteen post‐oestrous queens, with uterine luminal content in the absence of embryos were included. According to their outcome (pyometra surgery or parturition), the queens were retrospectively assigned to one of the following groups: Pyometra (PYO; n = 7) or pregnant (PRG; n = 7). In all the queens, two‐dimensional and Doppler ultrasound examinations of the uterus were performed. The presence or absence of clinical signs of systemic illness was recorded. The widest cross‐sectional diameter (UD), uterine wall thickness (WT), uterine lumen contents (LC) and uterine artery resistance index (RI) were measured. Uterine horn diameter was higher in PYO group than in PRG group (p < 0.05), while WT (p > 0.1) and LC (p = 0.09) did not differ between groups. Values of RI for PYO and PRG groups were 0.61 ± 0.03 vs 0.53 ± 0.09 (p < 0.05), respectively. PYO cats suffering from clinical signs of systemic illness showed larger UD than those without signs (p < 0.01). It is concluded that two‐dimensional and Doppler ultrasound might be useful to distinguish queens suffering from pyometra from those in early pregnancy. Secondly, the clinical signs of systemic illness were associated with a larger UD.

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“…The use of D-USG in veterinary practice has increased over the last decade. The haemodynamic characteristics of maternal and foetal vessels throughout pregnancy were previously reported in mares (Ouset et al 2012;Ferreira et al 2015), cows (Kelley et al 2017), ewes (Elmetwally et al 2016;Turna Yilmaz et al 2017), goats (Serin et al 2010), rabbits (Polisca et al 2010), bitches (Di Salvo et al 2006), and queens (Scotti et al 2008;Blanco et al 2014;Blanco et al 2016). As these studies show, the evaluation of the haemodynamic characteristics of maternal and foetal vessels by Doppler ultrasonography in pregnancy provides early diagnosis of foetal hypoxia, allows for appropriate treatment protocols to be determined, and leads to the successful management of pregnancy (Filkins and Koos 2005).…”

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confidence: 74%

Changes in Doppler indices throughout pregnancy in queens

et al. 2020

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Doppler ultrasonography (D-USG) is a non-invasive technique that has become an increasingly essential tool in veterinary theriogenology. The aim of this study was to evaluate the changes of Doppler indices in the foetal aorta (FA), foetal vena cava (FVC), umbilical artery (UA), and uteroplacental artery (UPA) in pregnant queens, thereby advancing knowledge about Doppler findings in normal feline pregnancy. The study was conducted with 10 pregnant queens with known gestational age. Doppler ultrasonography was performed every three days beginning from the 21st day to the 60th day of pregnancy. The pulsatility index (PI) and resistance index (RI) of FA, FVC, UA and UPA were recorded during the D-USG examinations. Although a declining trend was seen in the mean RI of FA, a comparison with earlier sampling periods revealed that significant decreases (P < 0.05) did not occur until Days 30 and 60. While PI of FVC was relatively constant, RI varied througout pregnancy. The PI and RI of UPA values were significantly lower (P < 0.05) on Day 60 when compared to the first five sampling periods for PI and the first six sampling periods for RI. The study concludes that the decrease in UA indices is a precursor for delivery time in queens. However, there is a need for further comparative studies involving impaired pregnancies.

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Evaluation of feline uterine and umbilical arteries blood flow in a pharmacologically induced abnormal gestation model

Cited by 11 publications

References 30 publications

Infertility in purebred cats – A review of the potential causes

Infertility in purebred cats – A review of the potential causes

Uterine two‐dimensional and Doppler ultrasonographic evaluation of feline pyometra

Changes in Doppler indices throughout pregnancy in queens

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