02032naa a2200397 a 450000100080000000500110000800800410001902400470006010000200010724501300012726000090025752009500026665000160121665000200123265000150125265000140126765000190128165000220130065000170132265000100133965000110134965000170136065000190137765000150139665000170141165000100142865000190143865000170145765300170147465300100149170000150150170000180151670000190153470000180155377300630157115230312023-06-01       1972    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1677/joe.0.05303252DOI1 aTHORBURN, G. D.  aProstaglandin F concentration in the utero-ovarian venous plasma of the ewe during the oestrous cycle.h[electronic resource]  c1972  aProstaglandin F2α. (PGF2α) is luteolytic in the ewe when infused into the ovarian artery (Barrett, Blockey, Brown, Cumming, Goding, Mole & Obst, 1971; McCracken, Baird & Goding, 1971) or the ipsilateral uterine vein (Thorburn & Nicol, 1971). These observations, together with the identification of PGF2α in the uterine venous plasma of anaesthetized ewes towards the end of the oestrous cycle (Bland, Horton & Poyser, 1971; McCracken et al. 1971), strongly suggest that PGF2α is the uterine luteolytic factor in sheep. This paper describes in detail the changes in PGF concentration in utero—ovarian venous plasma of conscious ewes during the oestrous cycle. Polyvinyl catheters (1·5 mm o.d.) were inserted into the right and left utero—ovarian veins via uterine vein branches in two Merino ewes 10 and 11 days after oestrus. Utero—ovarian venous samples were collected every 2–3 h from the day after surgery. Concentrations of PGF.  aBlood veins  aObstetric labor  aPhysiology  aPregnancy  aProstaglandins  aRadioimmunoassays  aReproduction  aSheep  aUterus  aCiclo Estral  aEndocrinologia  aFisiologia  aObstetrícia  aOvino  aProstaglandina  aReprodução  aBlood supply  aOvary1 aCOX, R. I.1 aCURRIE, W. B.1 aRESTALL, B. J.1 aSCHNEIDER, W.  tJournal Endocrinologygv. 53, n. 2, p. 325-326, May, 1972.