Conference Presentations by Wilfran Rivera R
Mas de 105 casos se han presentado hasta la feche desde 1995
Papers by Wilfran Rivera R
Journal of Animal Science
Tropical cow-calf operations using Bos indicus crossbreds are characterized by extended periods o... more Tropical cow-calf operations using Bos indicus crossbreds are characterized by extended periods of time before the establishment of ovarian cyclicity. The aim was to determine whether the increase of progesterone concentrations during postpartum anestrous using intravaginal devices along with injection of estradiol benzoate would advance the occurrence of first ovulation after calving. 269 suckled crossbred cows kept in different farms at North-Santander (Colombia) were randomized in one of the following treatments: 1:Control (n = 88) no further treatment; 2:P4 (n = 91) cows received an intravaginal device containing 0.588 g of progesterone during 7 days at day 50±3 after calving; 3:P4+E2 (n = 90) as treatment 2 plus an additional injection of 2.0 mg of estradiol benzoate at the time of device insertion. Ovarian ultrasound was performed weekly starting on the day of treatments until ovulation (disappearance of a dominant follicle with later appearance of a corpus luteum within two c...
Uploads
Conference Presentations by Wilfran Rivera R
Papers by Wilfran Rivera R