Ultrasonographic characterization of the uterine artery in the nonestrus bitch

Álvarez-Clau, Ana; Liste, F.

doi:10.1016/j.ultrasmedbio.2005.08.003

Cited by 34 publications

(33 citation statements)

References 22 publications

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“…Ultrasound evaluation was performed transabdominally by the same operator with a 5.5‐MHz convex transducer (M5, Mindray ™ , Shenzhen Mindray Bio‐Medical Electronics Co., Ltd., China), according to Alvarez‐Clau and Liste (). Although a higher transducer frequency (7.5 or 12.5 MHz) can be indicated to assess the female reproductive tract, we performed a previous experiment (Veiga et al., 2016) using a 5.5‐MHz transducer frequency to identify uterine vascularization changes in bitches in dioestrus and with uterine pathological conditions.…”

Section: Methodsmentioning

confidence: 99%

“…While uterine haemodynamic observations throughout the oestrous cycle have been performed in queens, cows and mares (Bollwein, Maierl, Mayer, & Stolla, ; Bollwein et al., ; Pereira, Freire, Pinto, Domingues, & Silva, ), such investigations in bitches have been limited to two stages of the oestrous cycle (oestrus and anoestrus) or during pregnancy (Alvarez‐Clau & Liste, ; Blanco et al., ; Freeman et al., ). Thus, the aim of this study was to characterize haemodynamic changes (uterine vascularization, systemic arterial blood pressure and heart rate) throughout the oestrous cycle in bitches.…”

Section: Introductionmentioning

confidence: 99%

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Uterine haemodynamic, vascularization and blood pressure changes along the oestrous cycle in bitches

Nogueira

Almeida

Angrimani

et al. 2016

Reprod Domestic Animals

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ContentsCharacterization of the bitch's reproductive physiology is of utmost importance for the development of new reproductive techniques and the diagnosis of reproductive diseases. In this respect, uterine B-mode ultrasonography has been employed in several studies; however, the focus on haemodynamic changes along the oestrous cycle is yet to be described. Thus, the aim of this study was to characterize haemodynamic changes (uterine vascularization, systemic arterial blood pressure and heart rate) throughout the oestrous cycle in bitches. For this purpose, ten Golden Retriever bitches were evaluated during an entire oestrous cycle, twice during each stage of the cycle. Uterine artery blood flow, velocity wave forms, haemodynamic parameters and vascularization were analysed by Doppler ultrasonography. Furthermore, uterine diameter, arterial blood pressure and heart rate were measured. Uterine artery pulsatility index at early prooestrus was significantly lower in comparison with early oestrus, mid-and late anoestrus. Uterine artery resistance index was higher at early oestrus when compared to late oestrus and uterine diameter was significantly higher during late prooestrus. Furthermore, mean arterial blood pressure was lower and heart rate was higher during late prooestrus in comparison with the other oestrous cycle stages.In conclusion, haemodynamic changes in the uterine artery, uterine diameter, systemic blood pressure and heart rate occur during the canine oestrous cycle. Specifically, there is an increase in uterine artery perfusion, uterine diameter and mean arterial blood pressure during prooestrus, while uterine blood flow diminishes during oestrus and anoestrus.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Uterine haemodynamic, vascularization and blood pressure changes along the oestrous cycle in bitches

Nogueira

Almeida

Angrimani

et al. 2016

Reprod Domestic Animals

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“…The peak systolic velocity, peak diastolic velocity, and reversed diastolic flow were assessed to calculate the RI, which showed high values in anestrus and metaestrus. 32 Maternal and fetal blood flows were evaluated in 16 crossbred and purebred bitches with an average weight of 34 kg. The RI and PI of the uterine arteries progressively decreased throughout the course of gestation.…”

Section: Doppler Ultrasound In Small-animal Reproductionmentioning

confidence: 99%

Doppler Ultrasound in Canine Pregnancy

Blanco

Arias

Gobello

2008

Journal of Ultrasound in Medicine

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“…Several studies addressed the role of the vascularity of genital organs in the estrous cycle, reproductive life, and gestation (Reed et al 1996, Nautrup 1998, Bollwein et al 2000, 2002a, 2002b, Köster et al 2001, Alvarez-Clau & Liste 2005, Di Salvo et al 2006, Scotti et al 2008, Brito et al 2010, Polisca et al 2010, Blanco et al 2011, Pereira et al 2012a, 2012b. Color-Doppler ultrasonography was previously used in cows to evaluate the vascularity of follicle, CL, and conceptus (Myamoto et al 2005, Pareja et al 2010, Silva et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Follicle and corpus luteum size and vascularity as predictors of fertility at the time of artificial insemination and embryo transfer in beef cattle

et al. 2015

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Abstract:Two ultrasound based fertility prediction methods were tested prior to embryo transfer (ET) and artificial insemination (AI) in cattle. Female bovines were submitted to estrous synchronization prior to ET and AI. Animals were scanned immediately before ET and AI procedure to target follicle and corpus luteum (CL) size and vascularity. In addition, inseminated animals were also scanned eleven days after insemination to target CL size and vascularity. All data was compared with fertility by using gestational diagnosis 35 days after ovulation. Prior to ET, CL vascularity showed a positive correlation with fertility, and no pregnancy occurred in animals with less than 40% of CL vascularity. Prior to AI and also eleven days after AI, no relationship with fertility was seen in all parameters analyzed (follicle and CL size and vascularity), and contrary, cows with CL vascularity greater than 70% exhibit lower fertility. In inseminated animals, follicle size and vascularity was positive related with CL size and vascularity, as shown by the presence of greater CL size and vascularity originated from follicle with also greater size and vascularity. This is the first time that ultrasound based fertility prediction methods were tested prior to ET and AI and showed an application in ET, but not in AI programs. Further studies are needed including hormone profile evaluation to improve conclusion.

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Ultrasonographic characterization of the uterine artery in the nonestrus bitch

Cited by 34 publications

References 22 publications

Uterine haemodynamic, vascularization and blood pressure changes along the oestrous cycle in bitches

Uterine haemodynamic, vascularization and blood pressure changes along the oestrous cycle in bitches

Doppler Ultrasound in Canine Pregnancy

Follicle and corpus luteum size and vascularity as predictors of fertility at the time of artificial insemination and embryo transfer in beef cattle

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