Relationship between colour flow Doppler sonographic assessment of corpus luteum activity and progesterone concentrations in mares after embryo transfer

Brogan, P.T.; Henning, Heiko; Stout, T.A.E.; Ruijter-Villani, Marta de

doi:10.1016/j.anireprosci.2015.12.010

Cited by 25 publications

(22 citation statements)

References 34 publications

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“…The same occurred evaluating data of the single days: there were statistically significant differences for CSA (days 6 and 10) VA (days 6, 10 and 14), and IV (day 14) (P<0.05) but not for [P4] (Table 3). CLs ultrasonographic characteristics seem to reflect their functionality, confirming previous studies performed in different species [14,[16][17][18][19]21,22], and, on the group of animals studied, CLs of the last cycles of the year were smaller and less vascularized than those of the previous cycles.…”

Section: Resultssupporting

confidence: 88%

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Corpus Luteum Vascularization and Progesterone Production in Autumn and Winter Cycles of the Mare: Relationship Between Ultrasonographic Characteristics of Corpora Lutea and Plasma Progesterone Concentration in the Last Cycles Before Anestrus

Panzani

Vita

Lainé

et al. 2017

Journal of Equine Veterinary Science

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Section: Resultssupporting

confidence: 88%

“…Color Doppler ultrasound has been applied for the evaluation of CL vascularization and perfusion in cattle and horses [12][13][14][15][16][17][18][19]. Corpora lutea maximum diameter [18,19] and vascularization [12,16,18,19] has been significantly correlated with plasma progesterone concentration during diestrus and pregnancy in the mare.…”

Section: Introductionmentioning

confidence: 99%

Corpus Luteum Vascularization and Progesterone Production in Autumn and Winter Cycles of the Mare: Relationship Between Ultrasonographic Characteristics of Corpora Lutea and Plasma Progesterone Concentration in the Last Cycles Before Anestrus

Panzani

Vita

Lainé

et al. 2017

Journal of Equine Veterinary Science

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“…Progesterone is the main hormone that establishes and maintains pregnancy. Progesterone levels in both the recipient mares in the present study were in accordance with previously reported progesterone levels in early pregnant mares carrying viable embryos [1, 7], confirming a normal-pregnancy status in the recipient mares in our study. We are hoping that the crossbred offspring (Hokkaido native pony × Connemara pony) from this study will introduce a generation of calmer horses in Japan.…”

supporting

confidence: 93%

Successful embryo transfer from Hokkaido native pony after artificial insemination with frozen semen

Hannan

Haneda

Itami

et al. 2019

The Journal of Veterinary Medical Science

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There has been no report of equine embryo transfer in Japan for the last 24 years. Our objective was to establish an effective protocol for embryo transfer in domestic horse. A Hokkaido native pony was bred by deep-horn artificial insemination with frozen semen from a Connemara pony. Embryo collection was performed using a non-surgical method on day 7. Two embryos were obtained from three flushes (67% recovery) and were transferred fresh into crossbred recipient mares. Both recipient mares were diagnosed pregnant (100% pregnancy rate) 5 days after embryo transfer and had normal progesterone levels until the end of the observation on day 35 of gestation. This is the first successful embryo transfer in Japan by artificial insemination using frozen semen. Embryo transfer technology could be extremely useful in improving the productivity of Japanese domestic and special riding horses.

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“…In all of them, the appearance of ovulation was recorded between 24- and 48-h post-administration by ultrasound. When the follicular diameter was ≥35 mm, endometrial edema was verified by ultrasound and consistent cervical tone by rectal palpation [ 11 ].…”

Section: Methodsmentioning

confidence: 99%

Assessment of Age Effects on Ovarian Hemodynamics Using Doppler Ultrasound and Progesterone Concentrations in Cycling Spanish Purebred Mares

Requena

Campos

Marín

et al. 2021

Animals

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In equine reproduction, accurate and timely detection of the moment of ovulation is of great importance. Power Doppler ultrasound technology is a non-invasive method that enables to assess the morpho-echogenic features and blood flow changes during the estral cycle in mares. The objective of the present study was to evaluate the influence of age on ultrasonographic parameters (follicular diameter, follicular blood flow—FBF, corpus luteum (CL) area and corpus luteum blood flow—CLBF) and blood plasma progesterone concentrations in cycling Spanish Purebred mares (15 less than 8 years old and 15 equal o higher than 8 years old). The ultrasound images obtained were analyzed with the Image Colour Summarizer software, which allows the quantification of the pixels of each image. Young mares had significantly higher FBF, CLBF and plasma progesterone levels. Moreover, linear regression analysis showed that blood progesterone levels could be predicted in both groups from CLBF with moderate precision and accuracy. In conclusion, Power Doppler was useful to assess ovarian hemodynamics. Our results support that age is a factor that significantly influences FBF and CLBF as well as blood progesterone concentration in mares. More studies would be needed to develop high precision and accuracy predictive models of blood progesterone concentration from CLBF measured by Power Doppler.

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Relationship between colour flow Doppler sonographic assessment of corpus luteum activity and progesterone concentrations in mares after embryo transfer

Cited by 25 publications

References 34 publications

Corpus Luteum Vascularization and Progesterone Production in Autumn and Winter Cycles of the Mare: Relationship Between Ultrasonographic Characteristics of Corpora Lutea and Plasma Progesterone Concentration in the Last Cycles Before Anestrus

Corpus Luteum Vascularization and Progesterone Production in Autumn and Winter Cycles of the Mare: Relationship Between Ultrasonographic Characteristics of Corpora Lutea and Plasma Progesterone Concentration in the Last Cycles Before Anestrus

Successful embryo transfer from Hokkaido native pony after artificial insemination with frozen semen

Assessment of Age Effects on Ovarian Hemodynamics Using Doppler Ultrasound and Progesterone Concentrations in Cycling Spanish Purebred Mares

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