Estrus synchronization and Fixed Time Artificial Insemination (FTAI) in dairy buffaloes during seasonal anestrus

Abstract

The aim of this work was to study estrus synchronization and fixed time artificial insemination (FTAI) G1 and G2 were 20 and 41% (p<0.05) and the ovulation rates were 16.6 and 37%, respectively (p<0.05). The dominant follicle (DF) diameter on D16 was 7.9 mm in G1 and 8.9 mm in G2 (p>0.05). Thirty-five percent of the animals in G1 and 54.1% in G2 showed a diameter DF greater than 8.0 mm on D16 (p>0.05). Thus, it could be concluded that the protocols synchronized the estrus, leading the concentration of the parturitions in the period of low milk production. Deslorelin was more efficient than buserelin due the higher percentage of DF ovulation and higher pregnancy rates.

Use of cooled buffalo semen as a strategy to increase conception rates in fixed-time artificial insemination programs during unfavorable reproductive periods

“…The general conception rate (CS+FS) obtained from present study the transitional period to the physiological reproductive season was 41.5% and there was no significant difference between the years (P>0.05). Similar values, 43.1 (Porto-Filho et al, 2004) and 37.0 (Frares et al, 2013) have been reported in studies carried out during the unfavorable reproductive period. In all three studies, the eCG dosage used was 400 IU.…”

Upgrading the fixed-time artificial insemination (FTAI) protocol in Romanian buffaloes

“…Various animal husbandry systems are currently used in most buffalo breeding countries, such as India ( 1 ), Brazil ( 2 ), Italy ( 3 ), and China ( 4 , 5 ), within smaller or larger farms. As the number of local buffaloes in Romania is constantly decreasing, the application of current reproductive biotechnologies in these breeds remains limited ( 6 , 7 ).…”