Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

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

2021; Elsevier BV; Volume: 234; Linguagem: Inglês

10.1016/j.anireprosci.2021.106870

1873-2232

Luiz Paulo Nogueira Aires, Beatriz Gasser, Priscila Silva, Priscila Del Aguila Da Silva, Marcus Vinícius Silveira, Rafael Kretzer Carneiro, Diego IwaoYamada, Luciana Cristina Padilha‐Nakaghi, Ricardo Andrés Ramírez Uscátegui, Stefano Spada, Marco Russo, Marcus Antônio Rossi Feliciano,

Reproductive Biology and Fertility

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.