Follicular dynamics and colour Doppler vascularity evaluations of follicles and corpus luteum in relation to plasma progesterone during the oestrous cycle of Surti buffaloes

Gaur, Mitesh; Purohit, G. N.

doi:10.1111/rda.13400

Cited by 12 publications

(10 citation statements)

References 41 publications

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“…A strong and positive correlation ( r = 0.8) was also found between the subjective and objective evaluation of analysis of CL vascularization by power flow Doppler method, which is not described in the literature in equine, which leads us to believe that, to facilitate the work of field veterinarian, only subjective assessment is sufficient in the analysis of vascular perfusion of the CL. Agreeing with other studies conducted in mares (Romano et al, 2015), goats (Balaro, Santos, Moura, Fonseca, & Brandão, 2017), sheep (Figueira et al, 2015), buffalo (Gaur & Purohit, 2019) and cows (Pugliesi et al, 2017), in our study it was possible to prove the proportional growth between the vascularization of P4 and CL. However, some mares presented with dosage of P4 at least 5.3 ng/ml and no luteal vascularization was observed.…”

Section: Discussionsupporting

confidence: 88%

Spectral Doppler ultrasound in selecting an equine embryo receiver

Ferreira

Morais

Andrade

et al. 2020

Reprod Domestic Animals

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The aim of this study was to evaluate whether the RI and PI values would help in choosing the best embryo recipient, and observe whether CL vascularization would influence P4 production. During the breeding season 2018/2019, the study was conducted using 35 mares, which is used for reference to collect data for the project on the day of embryo transfer. The utilized mares were divided into five groups followed by the day after ovulation, with D0 being the day of ovulation. Therefore, the five groups are as follows: D4—mares that were on the 4th post‐ovulation day; D5—mares that were on the 5th post‐ovulation day; and doing so successively for D6, D7 and D8. On the day of embryo transfer, the CL of the mares that selected as recipients was evaluated by B‐mode and power flow mode ultrasonography and the right and left dorsal branches of the uterine arteries by spectral Doppler ultrasonography. Blood samples were taken on the day of the embryo transfer for a dosage of P4 concentration by radioimmunoassay. No statistical difference was found between the variables when the mares were separated into pregnant and non‐pregnant mares, or when they were separated by age groups. When the groups of mares were compared by the day of embryo transfer, the statistical difference was found between the groups D5 × D6 (p = .0053) and D6 × D8 (p = .0036) in RI variable. In PI variable, the statistical difference was found between the groups D4 × D8 (p = .049), D5 × D6 (p = .0446) and D6 × D8 (p = .0024). We conclude that the mares with RI measurement of uterine arteries near 1.0 are correlated to mares with high CL vascularization and elevated P4 concentration.

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Section: Discussionsupporting

confidence: 88%

Spectral Doppler ultrasound in selecting an equine embryo receiver

Ferreira

Morais

Andrade

et al. 2020

Reprod Domestic Animals

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“…In the present study, the mean serum progesterone concentrations were the lowest during the peri-estrus phase, which increased through early luteal phase to a maximum concentration during mid luteal phase in cyclic Surti buffaloes. These results were in agreement with earlier observations (Mondal et al, 2010;De Tarso et al, 2017;Gaur and Purohit, 2019). The cyclic pattern of circulatory progesterone concentrations follows the known changes in corpus luteum function in buffalo during estrous cycle.…”

Section: Follicular/luteal Biometry and Endocrine Profilesupporting

confidence: 93%

“…The characteristics of follicular dynamics observed in cyclic Surti buffaloes indicated that 33.33% (n=2) and 66.66% (n=4) of buffaloes had one-and two-waves of follicular development, respectively, while in early pregnant buffaloes one-and two-waves of follicular patterns were in equal proportion (50.00% n=3 each, Table 1, 2). Similar predominant two-wave pattern of follicular development in buffaloes ranging from 53.0 to 83.3% was reported by Baruselli et al (1997), Presicce et al (2005), Noseir et al (2014) and Gaur and Purohit (2019). However, 62.5% of one-wave pattern in water buffaloes (Awasthi et al, 2006) and 53.6% and 83.3% of three wave pattern in Egyptian buffaloes (Barkawi et al, 2009) and in Graded Murrah buffaloes (Satheshkumar et al, 2011) were also reported.…”

Section: Follicular Dynamicssupporting

confidence: 69%

Follicular Dynamics and Endocrine Profile during Normal Estrous Cycle and Early Pregnancy in Surti Buffaloes

Chaudhari

Panchal

Dhami

et al. 2022

ijvsbt

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The study was conducted on Surti buffaloes for follicular dynamics and endocrine profile during normal estrous cycle (n=6) and early pregnancy (n=6). In cyclic and early pregnant buffaloes, one-wave (33.33% vs. 50.00%) and two-waves (66.66% vs. 50.00%) follicular development was recorded, without three-wave pattern. In cyclic buffalo, the length of estrous cycle and duration of inter-ovulatory interval were little shorter in one wave cycles than in two wave cycles (22.50±0.50 and 23.25±0.25 days). The number of follicles differed non-significantly within and between cyclic and early pregnant buffaloes. The mean maximum diameter of dominant follicle of second wave was significantly larger in cyclic than early pregnant animals for two wave pattern (1.09±0.02 vs 0.73±0.02 cm). In cyclic buffaloes, the mean maximum CL size recorded was 1.21±0.02 and 1.52±0.05 cm (P<0.05) in one- and two-wave cycles, respectively, whereas in early pregnant buffaloes, the corresponding CL size was 1.50±0.04 and 1.55±0.07 cm without significant difference. Thus the mean maximum CL size of early pregnant buffaloes was significantly larger than the cyclic buffaloes with one-wave cycle (1.50±0.04 vs. 1.21±0.02 cm). In the normal cyclic animals, the CL size increased gradually up to day 8 (1.30±0.04 cm) and then remained stable up to day 18 (1.26±0.15 cm), followed by regression and display of next estrus between day 19 and 21, whereas in early pregnant animals the CL size gradually increased up to day 10 (1.48±0.07 cm) and then it was maintained till day 22 (1.46±0.04 cm) of monitoring. The mean diameter of largest follicle recorded was on the day of estrus (0.98±0.07 cm) with variable development of follicles during metestrus to diestrus phase with a new follicles developed during proestrus to estrus phase reaching maximum diameter of ovulatory size (0.99±0.09 cm) between days 19 and 21, whereas in early pregnant animals, the diameter of larger follicle (0.76±0.05 cm) was not recorded up to ovulatory size. The mean concentrations of serum progesterone were lowest during peri-estrus phase, increased through early-luteal phase to a maximum concentration during mid-luteal phase (4.50±0.88 to 4.67±0.95 ng/ml) and then gradually declined through late-luteal phase of diestrus in normal cyclic animals with inverse trend in estradiol profile. However, in early pregnant animals the progesterone levels gradually increased initially and then were maintained higher (6.17±0.32 to 8.13±0.55 ng/ml) with basal estradiol throughout the luteal phase. The serum progesterone/estradiol levels were in harmony with the ovarian dynamics in both cyclic and early pregnant buffaloes. The mean concentrations of serum FSH, LH and kisspeptin in normal cyclic and early pregnant animals did not vary statistically between periods within the status or between reproductive status of animals at any of the periods. The concentration of serum kisspeptin dropped significantly in advanced pregnancy as compared to first and second trimester.

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“…A recent study evaluated the vascularity of ovarian follicles and the corpus luteum during the estrous cycle in Surti buffaloes (Gaur & Purohit, 2019) [14] . Studies on umbilical vasculature and blood flow to the uterus in buffalo during gestation are very few (Varughese, Brar & Dhindsa).…”

Section: ~ 461 ~mentioning

confidence: 99%