The impact of the cavitary corpus luteum on the blood progesterone concentration and pregnancy rate of embryo recipient heifers

Jaśkowski, Bartłomiej M.; Herudzińska, Magdalena; Gehrke, M.; Niżański, Wojciech

doi:10.1016/j.theriogenology.2021.11.003

Cited by 9 publications

(10 citation statements)

References 27 publications

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“…No differences have been found in plasma levels of progesterone in heifers with cavitary CL (Jaśkowski et al, 2022). The CL is an endocrine gland characterized by a high vascular network.…”

Section: Discussionmentioning

confidence: 93%

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Advances in the ultrasound diagnosis in equine reproductive medicine: New approaches

Ortega-Ferrusola

Gómez-Arrones

Martín-Cano

et al. 2022

Reprod Domestic Animals

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Ultrasound technology has led to new lines of research in equine reproduction, and it has helped to greatly improve clinical diagnosis and reproductive outcomes in equine practice. This review aims to discuss the potential clinical uses and new approaches of ultrasonography in equine reproduction. Doppler modalities are usually used to evaluate the vascularization of the follicles, corpus luteum (CL), and the uterus in the mare for diagnostic purposes. Inclusion of Doppler ultrasound in artificial insemination and embryo transfer programs could improve the reproductive outcome of these techniques. Better selection of recipients based on CL functionality, early pregnancy diagnosis 7-8 days postovulation of the donor before flushing or diagnosis of mares with endometritis with pathological increases of blood flow are examples of clinical applications in the mare. In the stallion, colour Doppler ultrasound has improved the diagnostic potential of B-mode ultrasound, improving the differential diagnosis of pathologies such as testicular torsion (decrease or absence of blood flow in the cord) and orchitis (increased blood flow in the cord). The incorporation of pulsed Doppler ultrasound into the reproductive evaluation of the stallion has enabled early identification of stallions with testicular dysfunction, thus allowing administration of timely treatment and subsequent improvements of the fertility prognosis for these animals.In addition, this technique has been used in the monitoring of patients undergoing medical and surgical treatments, thus verifying their efficacy. Recently, computerassisted pixel analysis using specific software has been performed in research work in order to semi-quantitatively evaluate the vascularization (colour and power Doppler) and echotexture of different organs. These softwares are now being developed for clinical purposes, as is the case with Ecotext, a computer program developed for the evaluation of testicular echotexture, providing information on testicular functionality.

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Section: Discussionmentioning

confidence: 93%

“…It is estimated that 50% of CLs do not present a uniform echogenic image and may present a central anechoic cavity (Miro, 2012). No differences have been found in plasma levels of progesterone in heifers with cavitary CL (Jaśkowski et al, 2022). The CL is an endocrine gland characterized by a high vascular network.…”

Section: Discussionmentioning

confidence: 99%

Advances in the ultrasound diagnosis in equine reproductive medicine: New approaches

Ortega-Ferrusola

Gómez-Arrones

Martín-Cano

et al. 2022

Reprod Domestic Animals

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“…Dies konnte auch bei Embryotransfer-Empfängertieren bestätigt werden [28]. In neueren Studien wurden Empfängertiere mit einem Gelbkörper mit Hohlraum zwischen Tag 6 und 8 sogar häufiger tragend [29,30].…”

Section: Follikelunclassified

Sonografische Verlaufsuntersuchungen zur Bedeutung der Follikelgröße und Gelbkörpermorphologie bei Milchkühen post inseminationem

Eggenschwiler,

Lejeune,

Bruckmaier

et al. 2023

Tierarztl Prax Ausg G Grosstiere Nutztiere

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Zusammenfassung Gegenstand und Ziel Der Besamungserfolg bei Kühen wird durch viele Faktoren beeinflusst. Das Ziel der vorliegenden Studie war es, Erkenntnisse über die Beziehungen von präovulatorischen Follikeln, Gelbkörpern und deren Hohlräumen sowie einer Trächtigkeit bei Milchkühen unter Feldbedingungen zu gewinnen. Material und Methoden Die Daten wurden bei 176 laktierenden Milchkühen erhoben, welche zur künstlichen Besamung angemeldet wurden. Die Kühe wurden mittels Sonografie am Tag der Besamung, 24 Stunden nach der Besamung, am Tag 9, am Tag 34 und ab Tag 42 nach Besamung gynäkologisch untersucht. Zudem wurde am Tag der Besamung und am Tag 9 Blut aus der Vena coccygea zur Progesteronbestimmung entnommen. Ergebnisse In Abhängigkeit des Ergebnisses der Trächtigkeitsuntersuchung konnte bei den untersuchten Milchkühen mit spontanen Ovulationen kein Unterschied zwischen den Größen der Follikel, der Gelbkörper und deren Hohlräumen sowie den Progesteronkonzentrationen 9 Tage nach der Besamung festgestellt werden. Im Gegensatz zu den Gelbkörpern ohne Hohlraum bleibt die Gelbkörperfläche während des Untersuchungszeitraums bei den Gelbkörpern mit Hohlraum konstant, wobei gleichzeitig der Hohlraum massiv an Größe verliert. Zudem wurden Rasseunterschiede in den Gelbkörpergrößen am Tag 34 nachgewiesen. Schlussfolgerungen Es konnte keine Ursache über die Bildung von Hohlräumen in Gelbkörpern und derer Verbindungen zu vorangegangenen Funktionskörpern gefunden werden. Klinische Relevanz Sowohl die Veränderungen der Gelbkörpergrößen über die Zeit als auch deren rassebedingte Unterschiede könnten einen Einfluss auf den Besamungserfolg haben.

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“…When starting the selection process of recipients, their ability to show estrus within a desired period should be taken into account either by detection of natural estrus or by the use of ovulation synchronization methods for fixed-time ET [ 8 ]. Another important key point to consider is the ability of the recipients to ovulate and form a functional corpus luteum (CL) able to produce progesterone for a sufficient time and in a sufficient quantity to act on the progesterone receptors of the uterus, modifying the pattern of uterine secretions necessary to favor the development and maintenance of the embryo [ 5 , 9 , 10 , 11 ]. Only during the luteal stage of the estrus cycle does the uterine microenvironment provide an adequate medium for the embryos to develop.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Luteal Function Using Rectal Palpation, B-Mode Ultrasonography, and Progesterone Determination to Improve Recipient Selection in Embryo Transfer Programs

Yáñez,

Barrio,

Fernández

et al. 2023

Animals

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Proper selection of recipients determines the success of embryo transfer (ET) programs. Therefore, the objectives of this study were to assess the accuracy of rectal palpation (RP) in selecting recipients according to the size and firmness of their corpus luteum (CL) compared to ultrasonography (US) and progesterone determination (P4); to check if US or P4 provide additional information to RP with regard to selecting animals with higher odds of maintaining the pregnancy; and to verify the reliability of the presence of a cavity and the volume of the CL within the ovary (%CLOV) as predictors of the ET outcome. In Experiment 1, measurements for the largest and minor diameter (LADCL and MIDCL), CL area, and P4 at ET day were collected, as well as the RP score, in 94 heifers. In Experiment 2, measurements for the LADCL, MIDCL, CL volume, %CLOV, and presence of a cavity were collected, as well as data about the procedure and metabolic markers, in 108 heifers. No differences were found in Experiment 1, whereas in Experiment 2, just a tendency was observed for the variable of veterinarian. Consequently, these results suggest that RP and US are useful methods to select recipients with, that US and P4 do not offer additional data to use to select animals with higher odds of maintaining pregnancy, and that neither %CLOV nor cavitary CL were good indicators for pregnancy rates.

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The impact of the cavitary corpus luteum on the blood progesterone concentration and pregnancy rate of embryo recipient heifers

Cited by 9 publications

References 27 publications

Advances in the ultrasound diagnosis in equine reproductive medicine: New approaches

Advances in the ultrasound diagnosis in equine reproductive medicine: New approaches

Sonografische Verlaufsuntersuchungen zur Bedeutung der Follikelgröße und Gelbkörpermorphologie bei Milchkühen post inseminationem

Assessment of Luteal Function Using Rectal Palpation, B-Mode Ultrasonography, and Progesterone Determination to Improve Recipient Selection in Embryo Transfer Programs

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