Ovarian follicular dynamic and plasma progesterone concentration in Alpine goats on the breeding season

Alves, Nadja Gomes; Torres, C. A. A.; Guimarães, José Domingos; Moraes, É. A.; Costa, Patrícia Barcellos; Silva, D.R.

doi:10.1590/1678-4162-9734

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Second, both NGPG and HNGPG improved blood flow of the ovarian artery and increased blood serum E 2 and NO levels, when compared with GPG. Classically, PGF 2α induces luteolysis by decreasing luteal blood flow, resulting in hypoxia; however, before the initial steps of the luteolytic cascade, PGF 2α increases luteal blood flow and CL vascularization [ 28 , 29 ]. Additionally, the increased blood serum E 2 and NO levels in NGPG and HNGPG may contribute to this effect through their vasodilation effects [ 30 , 31 ].…”

Section: Discussionmentioning

confidence: 99%

Nanodelivery System for Ovsynch Protocol Improves Ovarian Response, Ovarian Blood Flow Doppler Velocities, and Hormonal Profile of Goats

Hashem

El‐Sherbiny

Fathi

et al. 2022

Animals

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Fifteen cyclic, multiparous goats were equally stratified and received the common Ovsynch protocol (GPG: intramuscular, IM, injection of 50 mg gonadorelin, followed by an IM injection of 125 µg cloprostenol 7 days later, and a further IM injection of 50 mg gonadorelin 2 days later) or the Ovsynch protocol using nanofabricated hormones with the same dosages (NGPG) or half dosages (HNGPG) of each hormone. The ovarian structures and ovarian and luteal artery hemodynamic indices after each injection of the Ovsynch protocol using B-mode, color, and spectral Doppler scanning were monitored. Levels of blood serum progesterone (P4), estradiol (E2), and nitric oxide (NO) were determined. After the first gonadotrophin-releasing hormone (GnRH) injection, the number of large follicles decreased (p = 0.02) in NGPG and HNGPG, compared with GPG. HNGPG resulted in larger corpus luteum (CL) diameters (p = 0.001), and improved ovarian and luteal blood flow, compared with GPG and NGPG. Both NGPG and HNGPG significantly increased E2 and NO levels compared with GPG. HNGPG increased (p < 0.001) P4 levels compared with GPG, whereas NGPG resulted in an intermediate value. After prostaglandin F2α (PGF2α) injection, HNGPG had the largest diameter of CLs (p = 0.001) and significantly improved ovarian blood flow compared with GPG and NGPG. Both NGPG and HNGPG increased (p = 0.007) NO levels, compared with GPG. E2 level was increased (p = 0.028) in HNGPG, compared with GPG, whereas NGPG resulted in an intermediate value. During the follicular phase, HNGPG increased (p = 0.043) the number of medium follicles, shortened (p = 0.04) the interval to ovulation, and increased (p < 0.001) ovarian artery blood flow and levels (p < 0.001) of blood serum P4, E2, and NO, compared with GPG and NGPG. During the luteal phase, the numbers of CLs were similar among different experimental groups, whereas the diameter of CLs, luteal blood flow, and levels of blood serum P4 and NO increased (p < 0.001) in HNGPG, compared with GPG and NGPG. Conclusively, the nanodelivery system for the Ovsynch protocol could be recommended as a new strategy for improving estrous synchronization outcomes of goats while enabling lower hormone dose administration.

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Section: Discussionmentioning

confidence: 99%

Nanodelivery System for Ovsynch Protocol Improves Ovarian Response, Ovarian Blood Flow Doppler Velocities, and Hormonal Profile of Goats

Hashem

El‐Sherbiny

Fathi

et al. 2022

Animals

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“…Figures in parenthesis are the number of animals period, induced oestrus and at the onset of breeding season (Davila et al, 2017;Fatet et al, 2011). Insufficient gonadotrophic support following ovulation, especially LH pulses could result in premature regression of CL and its functional failure (Alves et al, 2018).…”

Section: Day Of Ovulationmentioning

confidence: 99%

Ovarian follicular dynamics in peripubertal Malabari goats

Aravind¹,

Simon²,

Jayakumar³

et al. 2022

Journal of Veterinary and Animal Sciences

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The aim of this study was to characterise the follicular dynamics in first two oestrous cycles of peripubertal Malabari goats. Transrectal ultrasonography was carried out on alternate days of oestrous cycles after first observed oestrus. Follicular studies revealed presence of two to five wave cycles with predominant three and four wave patterns. The interwave interval for ovulatory wave was longer than preceding waves in three and five wave cycles. The diameter of largest follicles in wave 1 was larger than follicles of subsequent waves of three, four and five wave cycles. The largest follicles in each wave could be observed from day 3 to day 13 of oestrous cycle. Majority of ovulations occurred on day 20 of oestrous cycles and short cycles were more in first oestrous cycle. The overall mean per cent of single and double ovulations were 56.3 and 43.8 and mean ovulatory follicle size was 6.59 ± 0.11 mm in peripubertal goats. The mean length of first and second oestrous cycle was observed as 17.72± 0.79 and 20.19± 0.43 days, respectively and mean duration of first and second oestrus was 36.88 ± 2.44 and 40.13 ± 1.84 h, respectively. The study revealed that predominant wave pattern was three and four waves in peripubertal Malabari breeds. The first oestrous cycle length was shorter and characterised by higher percentage of single ovulations with smaller periovulatory follicle size. Larger ovulatory follicles and double ovulations were observed in second oestrous cycle.

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Effect of Simmental bull seminal plasma protein in egg yolk-citrate extender on Kacang buck semen fertility

Susilowati¹,

Triana

Sardjito³

et al. 2020

Cryobiology

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Ovarian follicular dynamic and plasma progesterone concentration in Alpine goats on the breeding season

Abstract: Ovarian follicular dynamic and plasma progesterone concentration in Alpine goats on the breeding season [Dinâmica folicular ovariana e concentração plasmática de progesterona em cabras Alpinas durante a estação reprodutiva]

Cited by 3 publications

References 12 publications

Nanodelivery System for Ovsynch Protocol Improves Ovarian Response, Ovarian Blood Flow Doppler Velocities, and Hormonal Profile of Goats

Nanodelivery System for Ovsynch Protocol Improves Ovarian Response, Ovarian Blood Flow Doppler Velocities, and Hormonal Profile of Goats

Ovarian follicular dynamics in peripubertal Malabari goats

Effect of Simmental bull seminal plasma protein in egg yolk-citrate extender on Kacang buck semen fertility

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