OVARIAN FOLLICULAR DYNAMIC DURING EARLY PREGNANCY IN BUFFALO Bubalus bubalis HEIFERS

• Autor(a) principal: Martin, Ian
• Data de Publicação: 2008
• Outros Autores: Irikura, Christiane Rumi, Gimenes, Lindsay Unno, Orlandi, Cássia Maria Barroso, Oba, Eunice, Ferreira, João Carlos Pinheiro
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência animal brasileira (Online)
• Texto Completo: https://revistas.ufg.br/vet/article/view/442

The aim of the present study was to characterize the follicular dynamics during early pregnancy in Murrah heifers. Ten heifers were submitted to daily transrectal ultrasonographic examination, from the 18th to 60th day of pregnancy. Three animals presented follicular waves of 9.67?0.58 days in duration and the dominant and largest subordinate follicles measured, respectively, 11.9?1.3 mm and 7.0?1.0 mm. The growth plateau was 6.00?1.00 days in duration. The remaining seven heifers presented an irregular follicular development with three different patterns as follow: the first irregular observed pattern, characterized by waves of 7.91±1.68 days in duration, with the dominant follicle and the largest subordinated follicle reaching maximum diameter of 11.4±1.1 and 7.0±1.6 mm, respectively. The deviation on this pattern happened on day 3.57±0.53 and the plateau had an average duration of 4.67±1.37 days. The second irregular observed pattern presented waves lasting 6.44±1.81 days, with the dominant follicle and the largest subordinated follicle reaching maximum diameter of 9.0±0.6 and 6.8±0.4 mm, respectively. The deviation happened on day 4.00±1.41 after the wave detection. The third irregular pattern observed was characterized by periods of subsequent follicular growth without defined phases as described for the first and second patterns. In conclusion, from the 18th to 60th day of pregnancy, the follicular development is characterized by waves of different patterns in buffalo. Keywords Buffalo, Pregnancy, Ultrasound, Follicular Dynamic.