PMID: 16627952Apr 22, 2006Paper

Inhibitory effects of CIDR-based ovulation-synchronization protocols on uterine PGF2alpha secretion at the following luteal phase in early postpartum non-cycling beef cows

The Journal of Reproduction and Development
Mitsuhiro SakaseTsutomu Sawada

Abstract

We investigated whether CIDR-based ovulation-synchronization protocols inhibit secretion of prostaglandin (PG) F2alpha from the uterus in the following luteal phase in non-cycling beef cows. Ten early (a month) postpartum non-cycling Japanese Black beef cows were treated with (1) Ovsynch (GnRH analogue on Day 0, PGF2alpha analogue on Day 7, and GnRH analogue on Day 9; n=3), (2) Ovsynch+CIDR (Ovsynch protocol plus a CIDR for 7 days from Day 0; n=4), or (3) estradiol benzoate (EB) Ovsynch+CIDR (EB on Day 0 in lieu of the first GnRH treatment followed by the Ovsynch+CIDR protocol; n=3). An oxytocin challenge was administered on Day 24 to examine uterine PGF2alpha secretion. Plasma concentrations of 13,14-dihydro-15-keto- PGF2alpha were lower at 30-120 min after oxytocin administration in the Ovsynch+CIDR group and 75 min after administration in the EB Ovsynch+CIDR group than in the Ovsynch group (P<0.05). Plasma progesterone concentrations were higher from Days 1 to 7 in the Ovsynch+CIDR group and from Days 1 to 5 in the EB Ovsynch+CIDR group than in the Ovsynch group (P<0.05). The progesterone concentrations were higher on Days 27 and 29 in both CIDR-treated groups than in the Ovsynch group (P<0.05). In conclusion, in non-cycling...Continue Reading

References

Jul 1, 1977·Journal of Reproduction and Fertility·R WebbJ G Manns
Sep 26, 2001·Reproduction : the Official Journal of the Society for the Study of Fertility·A Shaham-AlbalancyD Wolfenson
Jun 4, 2002·Theriogenology·Marcelo F MartínezReuben J Mapletoft

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Citations

Apr 21, 2007·The Journal of Reproduction and Development·Noritoshi KawateTsutomu Sawada
Feb 13, 2019·The Journal of Reproduction and Development·Junki EgashiraKen-Ichi Yamanaka

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