Caracterização da dinâmica folicular e ovulação de vacas mestiças na região norte do estado do Ceará

Brito, Bruno Galvão de MatosJorge, Francisco JoséAlves, Eduardo Hálasson AraújoLima, Giuliane HálenMedeiros, Michael Nogueira deFigueirêdo, Emmanuelle Lima de

Knowing the follicular dynamics and predicting the time of ovulation is fundamental to the success ofbreeding programs that use reproductive biotechnologies. The objective of this study was to characterize thefollicular dynamics of crossbred cows reared in the northern region of the Ceará state, Brazil, identifying themoment of ovulation and correlating the time of ovulation with the rectal temperature. According to the dataobtained, there was a time difference on the onset of estrus and ovulation period between the cycles analyzed inthe dry season (≈27 hours) and the rainy months (≈33 hours). In addition, rectal temperature tends to decreaseas ovulation approaches. These data show the importance of knowing the pattern of follicular dynamics toimprove the pregnancy rate of herds in different conditions.(AU)

1. folículo
2. cow
3. follicle
4. vaca
5. ovulation
6. ovulação