Role of luteal biosynthesis of prostaglandin F2α on function and structure of the corpus luteum during luteolysis in heifers

Pinaffi, F.L.V.; Araujo, E.R.

doi:10.1016/j.domaniend.2017.10.007

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…Whereas, in the PGML group, the peripheral blood flow intensified and radiated deep into the structure spreading over 80% of the luteal parenchyma (G-4), 2 h after administration of PG. The blood flow intensity reduced and restricted to the luteal periphery (G-2), 24 h post PG, in both the groups (Pinaffi et al 2018). By 48 h post PG, lysis of luteal structure was evident along with reduced blood flow intensity (G-1) in PGML group while the intensity was medium (G-2) with no signs of lysis in PGEL group.…”

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confidence: 91%

Luteal haemodynamics during spontaneous and induced luteolysis in crossbred cattle

SATHESHKUMAR¹,

SOUNDARAPANDIAN²

2022

Indian J of Anim Sci

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The haemodynamics of CL during natural and induced luteolysis was studied in crossbred cattle using colour Doppler ultrasonography. In natural cycle, penetration of Doppler signals deep into the CL was observed during Day 15 â€“ 17 coinciding with the initiation of luteolysis. When PG was administered in the early luteal phase (Day 4), there was an increase in blood flow intensity in the periphery of CL, but when PG was administered in the mid luteal phase (Day 10), the intensified Doppler signals penetrated deep into the luteal parenchyma within two hours. There were no significant differences in velocity parameters and RI values between the treatment groups. Thus it was concluded that the characteristic difference in the intensity and nature of vascular perfusion was the determining factor for the initiation of luteolytic process in cattle.

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mentioning

confidence: 91%

Luteal haemodynamics during spontaneous and induced luteolysis in crossbred cattle

SATHESHKUMAR¹,

SOUNDARAPANDIAN²

2022

Indian J of Anim Sci

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“…Кроме того, экспериментальные данные по крупному рогатому скоту указывают на то, что в периовуляторный период внутрифолликулярный простагландин необходим для процесса овуляции [7].…”

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Estimation of the Efficiency of Hormone-Regulating Synchronization of Ovulation in Female Mice

Покровский

Patrakhanov

Lebedev

et al. 2021

Farm. farmakol. (Pâtigorsk)

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The aim of the wok is to assess the efficiency of hormone-regulating synchronization of ovulation in female mice, to increase the number of simultaneously fertilized individuals and obtain their offspring in the planned time frame.Materials and methods. The study was carried out on 180 female mice of three lines – CBA/lac, C57BL/6, BALB/c (n = 60), divided into three subgroups: intact (mating without confirmation of the estrous phase) (n = 20), cytological examination of vaginal secretions before mating with the determination of the estrous phase (n = 20), hormone-regulating synchronization of the estrous cycle with the introduction of progesterone (4.5 mg/100 g) on the 1st and prostaglandin F2α (0.083 mg/100 g) on the 7th day, once from the beginning of the experiment followed by immediate mating (n = 20). The planned date of delivery was considered the 22nd day from the moment of mating. The ovulation synchronization index (OSI) was assessed on the 14th day after mating.Results. On the 14th day from the beginning of the experiment, the ovulation synchronization index in the intact groups of the CBA/lac, C57BL/6, BALB / c lines, was 25%, 25%, 40%, respectively. On the 14th day, the number of pregnant individuals admitted to mating after the established estrus by the method of cytological assessment of vaginal secretions according to OSI, was 65%, 60%, 75%, respectively. In the experimental groups, OSI was 80%, 75%, 100%, respectively. On the 22nd day, the number of delivered females of CBA/lac, C57BL/6, BALB/c lines in the intact group, was 3, 1, 3 individuals; in the control group – 10, 6, 9, and in the experimental group – 16, 15, 17, which is significantly higher than in the control and intact groups (p˂0.05).Conclusion. Hormone-regulating synchronization of ovulation in female mice significantly increases the number of delivered individuals on the 22nd day, relative to those synchronized by estrus by 53%, and to intact groups by 85.5%. It has been revealed that an additional effect of hormonal synchronization of ovulation is an increase in the number of offspring by 120% in comparison with the control groups and by 390% in comparison with the intact groups. This method of timing planning of the offspring birth of the experimental animals reduces the time spent on preclinical studies of drugs for the following types of assessment of toxic effects: reproductive toxicity, embryotoxicity, teratogenicity, effects on fertility.

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Application of Ultrasonography in Bovine Reproduction

Satheshkumar

2022

Frontier Technologies in Bovine Reproduction

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Role of luteal biosynthesis of prostaglandin F2α on function and structure of the corpus luteum during luteolysis in heifers

Cited by 8 publications

References 18 publications

Luteal haemodynamics during spontaneous and induced luteolysis in crossbred cattle

Luteal haemodynamics during spontaneous and induced luteolysis in crossbred cattle

Estimation of the Efficiency of Hormone-Regulating Synchronization of Ovulation in Female Mice

Application of Ultrasonography in Bovine Reproduction

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