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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

High-definition ultrasonography in the evaluation of the reproductive tract of bitches during the follicular phase of the estrous cycle

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Author(s):
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Nogueira Aires, Luiz Paulo [1] ; Gasser, Beatriz [2] ; Silva, Priscila [2] ; Da Silva, Priscila Del Aguila [1] ; Silveira, Marcus Vinicius [2] ; Carneiro, Rafael Kretzer [2] ; IwaoYamada, Diego [3] ; Padilha-Nakaghi, Luciana Cristina [1] ; Ramirez Uscategui, Ricardo Andres [4, 2] ; Spada, Stefano [5] ; Russo, Marco [5] ; Rossi Feliciano, Marcus Antonio [1, 2, 6]
Total Authors: 12
Affiliation:
[1] Sao Paulo State Univ Julio de Mesquita Filho FCAV, Sch Agr & Veterinarian Sci, Dept Pathol Reprod & One Hlth, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil
[2] Sao Paulo State Univ Julio de Mesquita Filho FCAV, Sch Agr & Veterinarian Sci, Dept Vet Clin & Surg, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil
[3] Hosp Carlos Fernando Rossato, Coll Dr Francisco Maeda FAFRAM, Ituverava, SP - Brazil
[4] Fed Univ Jequitinhonha & Mucuri Valleys UFVJM, Inst Agr Sci, Unai, MG - Brazil
[5] Univ Naples Federico II, Dept Vet Med & Anim Prod, Naples - Italy
[6] Fed Univ Santa Maria UFSM, Dept Large Anim Clin, Diagnost Imaging Sect, Santa Maria, RS - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Animal Reproduction Science; v. 234, NOV 2021.
Web of Science Citations: 0
Abstract

The aim was to sonographically evaluate the reproductive tract of bitches during the follicular phase of the estrous cycle using High Density (HD) ultrasonic techniques. Females (n = 8) were evaluated at five different times throughout the follicular phase, as determined by vaginal cytology and blood progesterone concentrations. Ultrasonic exams were performed using the ACUSON S2000/SIEMENS device utilizing a multifrequency HD transducer (5.5-18 MHz). Videos of the ovaries were obtained and recordings were evaluated using a DICOM viewer software for counting and measuring the ovarian structures, which were assigned to groups based on diameter in mm: G1: <= 1; G2: from 1.01 to 3.5; G3 from 3.51 to 5.5; G4: from 5.51 to 10. There was a greater uterine thickness with the progression of the follicular phase (P < 0.05). Six distinct regions were identified in the uterine wall. The ovarian dimensions increased (P < 0.05) as stage of the follicular phase advanced. There was fluid detected around the ovaries after ovulation. There was a characteristic fat tissue hyperechogenicity around the ovaries at all timepoints. There was a difference in the number of ovarian structures of each dimension group at each time there were assessments (P < 0.05). There was a difference in diameter of the largest ovarian structure and in average value of wall thickness at all timepoints when there were evaluations (P < 0.05). The HD ultrasonography technique provides for excellent image resolution, allowing for a more precise characterization of the bitch's reproductive structures and changes occurring during the follicular phase of the estrous cycle. (AU)

FAPESP's process: 17/14957-6 - Study of new biotechnics for reproduction of canine and small ruminants
Grantee:Wilter Ricardo Russiano Vicente
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 19/15282-8 - MUE granted in the process 17/14957-6: Siemens S2000
Grantee:Wilter Ricardo Russiano Vicente
Support Opportunities: Multi-user Equipment Program