Effect of estradiol valerate on ovarian follicle dynamics and superovulatory response in progestin-treated cattle.

doi:10.1016/J.THERIOGENOLOGY.2004.07.004

Paper

Effect of estradiol valerate on ovarian follicle dynamics and superovulatory response in progestin-treated cattle.

Published Mar 15, 2005 · M. Colazo, M. Martínez, J. Small

Theriogenology

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49

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3

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Abstract

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Study Snapshot

Estradiol valerate (EV) can enhance ovarian follicle growth and superovulation in progestin-treated cattle, potentially improving reproductive performance.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Effect of estradiol valerate on ovarian follicle dynamics and superovulatory response in progestin-treated cattle.

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References

Fertility following fixed-time AI in CIDR-treated beef heifers given GnRH or estradiol cypionate and fed diets supplemented with flax seed or sunflower seed.

0.5mg ECP 24h after CIDR removal in beef heifers resulted in the highest pregnancy rate, regardless of treatment at CIDR insertion.

The effect of eCG or estradiol at or after norgestomet removal on follicular dynamics, estrus and ovulation in early post-partum beef cows nursing calves.

Both eCG and EDB effectively induce estrus after implant removal in post-partum beef cows, but eCG significantly increases ovulation rate in cows treated before dominant follicle selection.

Effects of estradiol cypionate (ECP) on ovarian follicular dynamics, synchrony of ovulation, and fertility in CIDR-based, fixed-time AI programs in beef heifers.

0.5 mg ECP (at CIDR removal or 24 hours later) induced synchronous ovulation in beef heifers with a fixed-time AI program, despite being less effective than 5 mg E-17 plus 100 mg progesterone for synchronizing follicular wave emergence.

Recent advances in the superovulation in cattle.

Reducing LH from pituitary extracts and initiating gonadotrophin treatments at the time of emergence of a follicular wave can improve superovulation in cattle, reducing variability and enhancing embryo transfer.

Effects of dose and route of administration of cloprostenol on luteolysis, estrus and ovulation in beef heifers.

Cloprostenol injections of 500 g are effective for luteolysis and estrus in beef heifers, with no significant difference in ovulation response between im and sc injections.

Citations