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Journal of Animal Science Abstract -

Luteal Function in Gilts after Prostaglandin F1, 2


This article in JAS

  1. Vol. 41 No. 6, p. 1706-1710


  1. D. M. Hallford3,
  2. R. P. Wettemann3,
  3. E. J. Turman3 and
  4. I. T. Omtvedt4
  1. Oklahoma Agricultural Experiment Station, Stillwater 74074



Twenty 9-month-old crossbred gilts were randomly allotted to one of four treatment groups to examine the effects of prostaglandin F (PGF) on estrous cycle length, plasma progesterone, estradiol and LH. Two groups were injected four times intramuscularly at 12-hr intervals starting on day 4 of the estrous cycle with either a total of 80 mg PGF or saline. The other two groups were treated similarly except treatments were started on day 12 of the estrous cycle. Estrous cycle length was not altered by PGF treatment starting on day 4; but when treatment was initiated on day 12, gilts had shorter estrous cycles than controls (17.2 ± .2 vs 18.6 ± .7 days, respectively, P<.10). The lengths of the estrous cycles after PGF given on days 12 and 13 were also shorter than the estrous cycles prior to treatment in the same gilts (P<.01). Plasma progesterone was not altered by treatment with PGF on days 4 and 5, but progesterone was reduced (P<.025) in gilts treated with PGF on days 12 and 13. Plasma estradiol was significantly elevated (P<.025) in gilts treated on days 12 and 13 compared to control gilts, but plasma LH was not significantly altered by either PGF treatment. It was concluded that PGF given on days 12 and 13 of the estrous cycle can hasten luteal regression in gilts.

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Copyright © 1975. American Society of Animal ScienceCopyright 1975 by American Society of Animal Science.