Surges of FSH during the follicular and early luteal phases of the estrous cycle in heifers.

@article{Bergfelt1997SurgesOF,
  title={Surges of FSH during the follicular and early luteal phases of the estrous cycle in heifers.},
  author={Don R. Bergfelt and Carla A Smith and Gregg P. Adams and O. J. Ginther},
  journal={Theriogenology},
  year={1997},
  volume={48 5},
  pages={757-68}
}
Surges of FSH were characterized in each of 12 Holstein heifers using a computerized cycle detector program, and as mean changes averaged over all heifers. Blood samples were collected 6 times a day at 4-h intervals beginning at late diestrus. Concentrations of FSH were adjusted relative to the preovulatory LH peak (Hour 0) and profiled beginning 48 h before and ending 120 h after the LH peak. Peak concentrations of FSH and LH occurred synchronously in 11 of 12 (92%) heifers, and only a 4-h… CONTINUE READING