Publications by authors named "Michele Ricieri Bastos"
Ovulation synchronization protocols are well established in beef and dairy cows. However, the protocol response rate is around 70-90%. In beef cows, factors such as inadequate nutrition and calf presence negatively impact the response of progesterone (P4)/estradiol-based ovulation synchronization protocols by interfering with GnRH release and consequently reducing LH pulsatility and final follicular development.
View Article and Find Full Text PDFA novel strategy for resynchronization of ovulation in Nelore cows using injectable progesterone (P4) and P4 releasing devices to perform two timed inseminations within 22 days.
Guilherme Pugliesi Danilo Zago Bisinotto Barbara Piffero Mello Fábio C Lahr Catia A Ferreira Michele Ricieri Bastos
Reprod Domest Anim
August 2019
Article Synopsis
- The study evaluated the reproductive performance of Nelore lactating cows undergoing a resynchronization process 12 days after timed artificial insemination (TAI) using either a long-acting progesterone (P4-LA) treatment or a control without it.
- Results showed no significant differences in pregnancy rates at various stages between the control and P4-LA groups but indicated higher estrous detection and pregnancy rates in the P4-LA group during the second TAI.
- Overall, while both groups had similar cumulative pregnancy rates after two TAIs, the use of P4-LA appears to enhance early resynchronization strategies for improving fertility in beef cows.