Pulses of prolactin before, during, and after luteolysis and synchrony with pulses of a metabolite of prostaglandin F2α in heifers.

@article{Ginther2011PulsesOP,
  title={Pulses of prolactin before, during, and after luteolysis and synchrony with pulses of a metabolite of prostaglandin F2α in heifers.},
  author={O. J. Ginther and M D Anwarul Haque Beg},
  journal={Animal reproduction science},
  year={2011},
  volume={128 1-4},
  pages={29-36}
}
Pulses of prolactin (PRL) and a metabolite of prostaglandin F2α (PGFM) were determined from hourly blood samples collected before, during, and after luteolysis (n=7 heifers). Progesterone concentrations were used to partition the results into six 12-h sets from 12h before to 36h after luteolysis. Pulses of PRL with a nadir-to-nadir interval of 4.4±0.2h were detected in each 12-h set. Pulses were rhythmic (P<0.05) in six heifers, beginning 12h before the end of luteolysis. The peak of a PRL… CONTINUE READING