Temporal relationships between peripheral plasma concentrations of oxytocin, progesterone and 13, 14-dihydro-15-keto-prostaglandin F2α during the oestrous cycle and early pregnancy in the ewe

Webb, Robert I.; Mitchell, Murray D.; Falconer, John; Robinson, J.S.

doi:10.1016/0090-6980(81)90105-2

Cited by 79 publications

(41 citation statements)

References 21 publications

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“…Plasma levels of OT prior to AI were low in both groups of animals, and were within the same range as those reported in the same species during the periovulatory period [43,50]. An increase in circulating OT was observed after difficult AI, while no change to OT concentrations occurred following easy insemination.…”

Section: Discussionsupporting

confidence: 55%

Plasma levels of cortisol and oxytocin, and uterine activity after cervical artificial insemination in the ewe

et al. 2002

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-The objective was to compare in the ewe the effects of easy and difficult procedures for artificial insemination (AI) (as related to rapid or poor accessibility of the cervix, respectively) on plasma cortisol (CORT) and oxytocin (OT), and uterine motility. All AI were simulated using a catheter empty of semen to study genital and environmental stimuli only. In experiment 1, 40 ewes were sampled after AI, and whether it was an easy or difficult procedure was reported for each animal. While CORT concentrations rose to a similar amount in all ewes, whatever the AI procedure, a significant OT response occurred after a difficult procedure only (n = 18) (17.4 ± 1.7 versus 12.7 ± 0.7 pg . mL -1 before AI, p < 0.05). In experiment 2, uterine activity was monitored in 4 ewes using an implantable telemetric transmitter equipped with an intrauterine pressure catheter. An increased uterine activity occurred during 2 ± 1 min after an easy AI (n = 5), whereas the evoked activity lasted for 15 ± 4 min after a difficult AI (p < 0.001, n = 7). A similar long-lasting response occurred after OT administration (100 mIU, i.v.). We concluded that the increase in uterine motility after a difficult AI resulted from a reflex release of OT, and not to a "stress" effect.artificial insemination / cortisol / oxytocin / uterine contractions / telemetry Reprod. Nutr. Dev. 42 (2002) [381][382][383][384][385][386][387][388][389][390][391][392] 381

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Section: Discussionsupporting

confidence: 55%

Plasma levels of cortisol and oxytocin, and uterine activity after cervical artificial insemination in the ewe

et al. 2002

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“…In a recent review of this question, Wathes and Lamming (1995) Goff, 1985), ewes (Fairclough et al, 1984) and mares (Goff et al, 1987) and the pulsatile peaks of PGFM in peripheral plasma observed during luteolysis in these species are also abolished in pregnancy (Kindahl et al, 1976;Peterson et al, 1976;Webb et al, 1981 (Wilson et al, 1972), or similar to (Pexton et al, 1975;Lewis et al, 1977) (Payne and Lamming, 1994 …”

Section: Discussionmentioning

confidence: 99%

“…3a-c (Kindahl et al, 1976), sheep (Webb et al, 1981) and horses (Neely et al, 1979 prevented oestrogen-induced luteolysis (Lewis and Warren, 1974). …”

Section: Discussionmentioning

confidence: 99%

Control of luteolysis in the one-humped camel (Camelus dromedarius)

Skidmore¹,

Starbuck²,

Ge³

et al. 1998

Reproduction

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Blood plasma concentrations of 13,14-dihydro-15-keto PGF2\g=a\(PGFM) were Furthermore, reduction in the amount of PGF2\g=a\ released is associated with luteal maintenance and the embryonic signal for maternal recognition of pregnancy must be transmitted before day 10 after ovulation if luteostasis is to be achieved. However, the results also indicate that, in contrast to ruminants, the release of endometrial PGF2\g=a\ in the non-pregnant camel may not be controlled by the release of oxytocin.

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“…The treatments for superovulation produced various number of the CL ranging between 4 and 32 estrous cycle, rising to mid-luteal phase and falling at luteal regression [1][2][3]. OT is released into the circulation in a pulsatile manner during the estrous cycle in ewes [4] and cows [5,6].…”

Section: Implantation Of Mds Into CLmentioning

confidence: 99%

Local Release of Progesterone and Oxytocin from Microdialyzed Corpus Luteum in Superovulated Ewes: Characterization during the Non-breeding Season.

Miyamoto¹,

Takase²,

Tashiro³

et al. 1995

Journal of Reproduction and Development

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Temporal relationships between peripheral plasma concentrations of oxytocin, progesterone and 13, 14-dihydro-15-keto-prostaglandin F2α during the oestrous cycle and early pregnancy in the ewe

Cited by 79 publications

References 21 publications

Plasma levels of cortisol and oxytocin, and uterine activity after cervical artificial insemination in the ewe

Plasma levels of cortisol and oxytocin, and uterine activity after cervical artificial insemination in the ewe

Control of luteolysis in the one-humped camel (Camelus dromedarius)

Local Release of Progesterone and Oxytocin from Microdialyzed Corpus Luteum in Superovulated Ewes: Characterization during the Non-breeding Season.

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