Peri-follicular blood flow in the follicle from which ovulation occurs in cows

Satheshkumar, S.

doi:10.1016/j.anireprosci.2018.09.014

Cited by 10 publications

(7 citation statements)

References 17 publications

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“…The DPD and systolic upstroke time of MUA waveforms were studied for the first time in our study for assessment of uterine inflammation. Satheshkumar () also recorded DPD during oestrus and found that DPD was low prior to ovulation in normal ovulators as compared to delayed ovulators. This may be attributed to vasodilation and increased blood flow through the MUA (Pancarci et al, ).…”

Section: Discussionmentioning

confidence: 99%

Doppler sonography of uterine blood flow at mid‐oestrus during different degree of clinical endometritis in dairy cows

Sharma

Singh

Abrol

et al. 2019

Reprod Domestic Animals

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The present study was aimed at analysing the mid‐oestrous uterine blood flow parameters during varying degree of endometritis in dairy cows. Degree of clinical endometritis was adjudged on the basis of visual examination of uterine discharge collected from cows at mid‐oestrus, that is mild (slightly turbid; n = 13), moderate (turbid with pus flakes; n = 14) and severe (milky; n = 13). Pulsatility and resistance indices (PI and RI), time average mean velocity (TAMEAN), time average maximum velocity (TAMAX), diameter of the artery, volume of blood flow, Doppler pulse duration (DPD) and systolic upstroke/acceleration time (AT) were measured to study the spectral waveforms at mid‐oestrus. Significantly higher (p < .01) PI and RI were found in cows diagnosed with mild degree in comparison with cows diagnosed with moderate and severe degrees of clinical endometritis. There was significantly higher (p < .01) velocity (TAMEAN and TAMAX), volume of blood flow (BFV‐TAMEAN, BFV‐TAMAX) and DPD in both the middle uterine arteries during moderate and severe degrees of clinical endometritis as compared to mild endometritis. However, significantly higher (p < .01) AT was recorded in cows diagnosed with mild degree as compared to moderate and severe degrees of clinical endometritis. Pearson's correlation analysis has shown that RI was positively correlated with PI and AT in all the groups under study (mild degree, r = .72 and .49; moderate degree, r = .54 and .38; severe degree, r = .90 and .42; p < .05). However, there found significantly negative correlation (p < .05) with other parameters in all the cows irrespective of degree of inflammation. Therefore, it may be deducted that assessment of uterine inflammation can be done with a non‐invasive technique known as Doppler sonography which can be useful in adjudging the hemodynamic changes inside uterus and future fertility of dairy cows.

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Section: Discussionmentioning

confidence: 99%

Doppler sonography of uterine blood flow at mid‐oestrus during different degree of clinical endometritis in dairy cows

Sharma

Singh

Abrol

et al. 2019

Reprod Domestic Animals

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“…Inhibition of neuropeptide Y promotes the release of GnRH from the hypothalamus, which in turn promotes FSH and Luteinizing Hormone pulses [52]. In addition to improving the ovulation rate, increased blood flow allows for a better supply of hormones, nutrients, and oxygen during follicle development, which may be associated with better quality of the ovulated oocyte [53].…”

Section: Discussionmentioning

confidence: 99%

Effect of short-term nutritional supplementation of green microalgae on some reproductive indicators of Anglo-Nubian crossbred goats

et al. 2023

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Background and Aim: Despite the wide spectrum of uses, one of the chief drawbacks to expanding microalgae as a food supplement in livestock is the lack of a regimen protocol with established dosage and time length of supplementation. Therefore, this study aimed to investigate the effect of short-term supplementation with increasing doses of microalgae on ovarian response in goats reared in northeast Brazil. Materials and Methods: Twenty-eight goats had their follicular waves synchronized using three injections of a prostaglandin analog at 7-day intervals. Goats were allocated to groups that received daily oral Chlorella supplementation for 7 days, respectively: 5 g, GMA5 group (n = 7), 10 g (GMA10; n = 7), and 20 g (GMA20; n = 7). The control group (GMA 0; n = 7) received a drench of water. Results: The groups showed a quadratic increase (p = 0.0156) in kidney fat thickness but there was a significant reduction in dry matter intake in the GMA20 group. The GMA20 group showed higher glucose levels and glutathione peroxidase (p < 0.05). There was a decrease in plasma cholesterol (p < 0.05) in the 10 and 20 g treatments. The number of total follicles increased quadratically. Follicles <3 mm increased linearly (p = 0.0113) for microalgal supply. The GMA10 and GMA20 groups had the highest values (p < 0.05) among the treatments. After inducing ovulation, there was a significant increase in follicles >3 mm in the GMA10 group, which also showed a greater (p < 0.05) area of intraovarian blood perfusion and pulsatility index of the ovarian artery. Conclusion: We conclude that for 7 days of supplementation, the administration of 10 g of microalgae appears to be the most efficient dosage for stimulating the ovarian response in tropical goats. Keywords: Doppler, follicles, goat, microalga, ovarian blood flow, ovarian response.

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“…Así mismo, Ginther (2007) señala que este incremento de señal Doppler en la pared del folículo es debido a un activo proceso de neovascularización. Complementariamente, Satheshkumar (2018), tras la realización de un estudio con Doppler espectral, observó una menor resistencia al paso del riego sanguíneo el día del estro, la cual indica vasodilatación e incremento del flujo al folículo para asegurar un adecuado aporte de factores nutricionales, endocrinos y de crecimiento para favorecer la ovulación.…”

Section: Predecir La Ovulación Y Estimar La Fertilidadunclassified

“…Por otro lado, tanto el área ocupada por el flujo sanguíneo, como su velocidad (medida en la base del folículo), están temporalmente asociadas con el incremento de la concentración en plasma de estradiol y el pico de LH (Acosta et al, 2003), aumentando su intensidad a medida que se acerca el momento de la ovulación (Satheshkumar, 2018). Por consiguiente, la irrigación de los folículos podría ser de utilidad para distinguir de manera precoz cuál será el futuro folículo dominante e incluso podría ayudar a predecir el momento de la ovulación.…”

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Ecografía Doppler y su aplicación en reproducción bovina: revisión

Yáñez¹,

González²,

Herradón³

et al. 2021

ITEA

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La ultrasonografía en modo Doppler es una técnica que permite el estudio del flujo sanguíneo de los diferentes órganos y estructuras de manera no invasiva. Por ello, en el ámbito de la reproducción del ganado vacuno, ha sido de gran ayuda para identificar los cambios hemodinámicos que tienen lugar en el tracto genital durante el ciclo estral, la gestación y el post-parto. Empleando esta información, se han investigado las diferentes aplicaciones de esta herramienta a nivel de campo con el objetivo de optimizar el rendimiento de las explotaciones.Así, entre sus usos se encuentra la posibilidad de predecir el momento de la ovulación y de estimar la fertilidad; además, permite la evaluación de la funcionalidad del cuerpo lúteo, de manera que, no solo resulta de utilidad a la hora de establecer protocolos de inducción/sincronización de celo, sino que también podría permitir la realización de un diagnóstico de "no gestación" más precoz. De igual modo, se ha estudiado su eficacia a la hora de predecir el éxito de los protocolos de superovulación y el número de embriones recolectados. Por último, esta técnica podría ser de interés para detectar lo antes posible patologías uterinas post-parto y diferenciar los tipos de quistes ováricos.No obstante, no podemos olvidar que, actualmente, no ha demostrado ser suficientemente fiable de manera individual para la realización de ciertos procedimientos (por ejemplo, llevar a cabo un diagnóstico de gestación más temprano o valorar la fertilidad), aunque sí ha ofrecido resultados interesantes para continuar la investigación en este campo.

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Peri-follicular blood flow in the follicle from which ovulation occurs in cows

Cited by 10 publications

References 17 publications

Doppler sonography of uterine blood flow at mid‐oestrus during different degree of clinical endometritis in dairy cows

Doppler sonography of uterine blood flow at mid‐oestrus during different degree of clinical endometritis in dairy cows

Effect of short-term nutritional supplementation of green microalgae on some reproductive indicators of Anglo-Nubian crossbred goats

Ecografía Doppler y su aplicación en reproducción bovina: revisión

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