Ovarian follicular dynamics during the estrous cycle in buffalo ()

Baruselli, Pietro Sampaio; Mucciolo, Raul Gastão; Visintin, José Antônio; Viana, Wilson Gonçalves; Arruda, Rubens Paes de; Madureira, Ed Hoffmann; Oliveira, Carlos Alberto de; Molero-Filho, J.R.

doi:10.1016/s0093-691x(97)00159-3

Cited by 129 publications

(100 citation statements)

References 44 publications

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“…In addition, it also provides a new insight into certain aspects of follicular dynamics in acyclic buffaloes. The presence of various size combinations of follicles in cyclic buffalo population at any particular point of time is indicative of the fact that follicular development is a continuous process in buffalo supporting the previous views about this process in the species (Baruselli et al 1997;Ali et al 2003). A similar observation in acyclic buffaloes of this investigation suggests that follicular growth continues even during acyclicity.…”

Section: Discussionsupporting

confidence: 87%

“…This notion is further supported by the finding that there is no difference in the number of total follicles as well as those in small size category between cyclic and acyclic buffaloes. A significantly higher number of small follicles compared to medium-and large-sized ones in both cyclic and acyclic buffaloes possibly suggests that while a large number of follicles enter the common growth phase, only a small proportion develops further to attain the size corresponding to selection (about 7.2 mm) and dominance (8.0-10.0 mm) in the species (Baruselli et al 1997;Ali et al 2003;Gimenes et al 2007). A nearly similar number of medium-and large-sized categories in the group possibly indicates that once follicles attain diameter greater than 7.0 mm, in majority (83.3%) of the cases, they develop further to attain the large size.…”

Section: Discussionmentioning

confidence: 99%

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Follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in water buffalo (Bubalus bubalis)

Khan

Das

2011

Trop Anim Health Prod

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The objective of this study was to examine the follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in buffaloes. Ovaries were collected from 56 acyclic and 95 cyclic buffaloes at slaughter, surface follicle number was counted and follicles were classified into small (5.0-6.9 mm), medium (7.0-9.9 mm), and large (≥ 10.0 mm) size categories based on their diameter. Follicular fluid was aspirated and assayed for nitric oxide, ascorbic acid, estradiol, and progesterone. Acyclic buffaloes had a higher (P<0.05) number of medium-sized follicles and a lower (P<0.001) number of large follicles than the cyclic ones. In acyclic animals, the number of large follicles was lower (P<0.01) than in medium size category which in turn was lower (P<0.001) than the number of small follicles. In contrast, the number of medium and large follicles was not different (P>0.05) in the cyclic control. However, the number of small-sized follicles was higher (P<0.001) compared to the other two categories. The incidence of large-sized follicles was lower (P<0.05) in acyclic buffalo population compared to the cyclic control. Evaluation of estrogenic status demonstrated that all the follicles of acyclic buffaloes are estrogen-inactive (E (2)/P (4) ratio<1). Small- and medium-sized follicles of acyclic buffaloes had higher concentrations of nitric oxide (P<0.05 and P<0.001, respectively) and lower concentrations of ascorbic acid (P<0.05 and P<0.01, respectively) than the corresponding size estrogen-active follicles of their cyclic counterparts. In conclusion, this study indicates that follicular development continues during acyclicity in buffaloes. Although follicles in some acyclic buffaloes attain a size corresponding to morphological dominance, they are unable to achieve functional dominance, perhaps due to an altered balance of intrafollicular nitric oxide and ascorbic acid and, as a result, these follicles instead of progressing to ovulation undergo atresia.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in water buffalo (Bubalus bubalis)

Khan

Das

2011

Trop Anim Health Prod

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“…Differences between follicles number during the cycle were due to the emergence of small follicles (beginning of wave) and their growth and regression. It is similar to study done in Egyptian buffaloes (Baruselli et al, 1997). Manik et al, (1999) reported no significant difference in number of small follicles in control animals on various days of estrous cycle in cyclic buffaloes.…”

Section: Ovarian Dynamics In Cyclic Buffaloessupporting

confidence: 89%

Comparative Study of Follicular Turn Over in Cyclic and Non-Cyclic Murrah Buffaloes through 2D Trans-Rectal Ultrasonography

Singh¹,

Chandolia²,

Dutt³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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The present research was based on study of follicular dynamics in cyclic (n=6) and noncyclic (n=6) Murrah buffaloes by using 2D trans-rectal ultrasonography from day 1 to 21 of study period. During each examination, number of small (<4mm), medium (4-8mm) and large follicles (>8mm) were assessed along with diameter of medium and large follicles. Moreover, diameter of corpus luteum was also studied daily in cyclic animals. The number of small follicles was significantly (P<0.05) higher on 6 th day (2.75±0.25) of cycle as compared to number of small follicles on days 4, 9, 14, 16 and 18-21 of study in cyclic animals. The number of small follicles in non-cyclic buffaloes did not differ significantly (P<0.05) on day 3 (2.00±0.00), 10 (2.00±0.00) and 20 (2.00±0.58) of observations but these were significantly higher than other days of study. Significantly higher number of medium size follicles was recorded on 6 th day (4.50±1.50) as compared to day 18 and 20 of study in cyclic animals. But there was no variation in non-cyclic animals throughout the study. The number of large follicles on day 3 (1.80±0.20) versus days 15, 16 and 18-20 of study varies significantly (P<0.05) while on other days there was non-significant variation. The number of large follicles in cyclic animals varied nonsignificantly throughout the study. The diameter of medium sized follicles in cyclic animals on day 5 (6.77±0.42) was significantly higher than other days of cycle except days 19 and 20 of the cycle. However, the diameter of medium follicles on 1 st day (7.18±.45mm) of the study was significantly higher than follicles of days 7, 11-13, 17-19 and 21 of study in non-cyclic animals. The diameter of largest follicles recorded between 11.45±2.35mm and 14.12±1.40mm in cyclic and non-cyclic animals, respectively. The large size follicle diameter on 21 st day of study was significantly (P<0.05) higher than the diameter of 6 th day while on other days there was non-significant variation in non-cyclic animals. In cyclic buffaloes, CL appeared on 5 th day of cycle and attained maximum size on 14 th day (16.43±.40mm) and then declined. From the present study, it was concluded that the selected non-cyclic animals were not in true anestrus condition as there was follicles development on ovaries that reaches to preovulatory size but not ovulated that may be due to irregular gonadotrophin synthesis or hormonal imbalance and managemental errors. K e y w o r d s2D ultrasonography, Corpus luteum, Follicle, Murrah buffaloes.

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“…The development of one and two ovarian follicular waves in buffaloes (Manik et al 1994;Taneja et al 1996;Baruselli et al 1997;Ali et al 2003;Presicce et al 2005;Warriach and Ahmad 2007) is comparable with follicular wave phenomenon described in cattle. In the cows, three and four waves of follicular development were observed during the estrous cycle (Valdez et al 2005;Gaur and Purohit 2007).…”

Section: Introductionsupporting

confidence: 77%

“…These results were in accordance with the previous studies in Indian and Egyptian buffaloes (Taneja et al 1996;Ali et al 2003;Noiser 2003). Studies on Brazilian breeds (Baruselli et al 1997) and Pakistanian breed (Nili-Ravi) of buffalo cows (Warriach and Ahmad 2007) found that the majority of these buffaloes had three and four wave patterns of follicular growth.…”

Section: Discussionmentioning

confidence: 99%

A study on the ovarian follicular dynamic in Iraqi Northern Buffaloes

Azawi

Ali

Noaman

2008

Trop Anim Health Prod

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The aim of the present study was to test the hypothesis of wave pattern of follicular growth and to monitor the ovarian follicular dynamic in Iraqi buffalo cows. Reproductive tracts were collected at random intervals slaughtered at Mosul abattoir. According to morphological appearance of the corpus luteum, the estrous cycle was divided into four stages. The number of subordinate follicle (<5 mm in diameter) was higher during stage 1 (metestrous) and stage (proestrous and estrous) than during other stages of the estrous cycles, 13.5 +/- 6.08 and 4 9.41 +/- 3.94, respectively. There were fewer follicles (5-8 mm in diameter) during early diestrous and proestrous, 1.66 +/- 1.42 and estrous, 0.69 +/- 0.47 than during metestrous, 4.53 +/- 3.23 and late diestrous, 3.66 +/- 2.23. Follicles > 8-12 mm in diameter were more numerous during early diestrous, 1.62 +/- 1.29 and late diestrous, 1.03 +/- 0.72. A total 38 (64.6%; 82/127) animals examined showed follicles larger than 8 mm during early and late diestrous (stage 2 and stage 3). This indicated that these buffaloes developed two follicular waves in their cycle. Buffaloes did not show follicles larger than 8 mm during early and late diestrous were 45 animals (35.4%; 45/127), but all of these presented one large follicle during the following stage. These buffaloes develop only one follicular wave in their cycle. It could be concluded that, 64.6% of Iraqi buffalo cows develop two patterns of follicular waves, and 35.4% showed one wave of follicular dynamics.

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Ovarian follicular dynamics during the estrous cycle in buffalo ()

Cited by 129 publications

References 44 publications

Follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in water buffalo (Bubalus bubalis)

Follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in water buffalo (Bubalus bubalis)

Comparative Study of Follicular Turn Over in Cyclic and Non-Cyclic Murrah Buffaloes through 2D Trans-Rectal Ultrasonography

A study on the ovarian follicular dynamic in Iraqi Northern Buffaloes

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