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Characterization of hormonal patterns in the beef cow during postpartum anestrus


, : Characterization of hormonal patterns in the beef cow during postpartum anestrus. Journal of Animal Science 56(2): 445-453

Levels of LH, prolactin, progesterone, cortisol, oestrone and oestradiol-17beta were determined in blood samples, collected at 6-h intervals, beginning 2 wk before expected parturition and continuing until 10 days after 1st postpartum oestrus, from 6 crossbred, suckled beef cows before and after their 2nd calving. Samples were also collected at 15-min intervals for 4 h once weekly. The postpartum interval averaged 48 plus or minus 19 days.

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Accession: 001053401

PMID: 6841292

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Related references

Humphrey, W.D., 1977: Characterization of hormonal patterns in the postpartum anestrous beef cow. Blood samples were collected at 6-h intervals from 6 crossbred (Jersey X Hereford and Aberdeen-Angus X Hereford) cows beginning 2 wk before the expected date of parturition and ending 10 days after the 1st postpartum oestrus. Samples were also col...

Sharpe P.H.; Gifford D.R.; Flavel P.F.; Nottle M.B.; Armstrong D.T., 1986: Effect of melatonin on postpartum anestrus in beef cows. The effect of melatonin treatment on intervals from calving to first postpartum estrus and ovulation was determined in Shorthorn cows which calved May 8 to June 14. Melatonin (500 mg in beef tallow) was injected subcutaneously (s.c.) into 20 cows...

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