Two experiments were conducted to evaluate the effect of the intramuscular injection of betacarotene associated to tocopherol on the plasma concentration progesterone of superovulated Holstein heifers (experiment 1) and in crossbred (Bos taurus x Bos indicus) heifers submitted to fixed-time embryo transfer (FTET, experiment 2). In experiment 1, after estrus synchronization and superovulation an...

BACKGROUND Radiotherapy has many side effects on fertilization in young women. Radiation can lead to ovarian failure in women who underwent abdomen or pelvic radiotherapy. OBJECTIVE This study helps us to investigate ovarian response of NMRI female mice to ovarian stimulating hormones (PMSG, HCG) after whole-body gamma irradiation. MATERIALS AND METHODS 45 pregnant mice were divided into tw...

ABSTRACT The objective of this study was to quantify the superovulatory response and embryo production Brazilian Bergamasca sheep evaluate link follicular condition before treatment, as a reference for selection donors with potential superovulation. Follicular population twenty-three evaluated by ultrasound during metestrus phase estrous cycle divided into groups low, medium high population. Su...