Hattersley, J P Estimation of oestrone sulphate in the serum of pregnant sows. [electronic resource] - Journal of reproduction and fertility Jan 1980 - 7-12 p. digital Publication Type: Journal Article ISSN: 0022-4251 Standard No.: 10.1530/jrf.0.0580007 doi Subjects--Topical Terms: Androstenedione--bloodAnimalsEstrone--bloodFemalePregnancyPregnancy, AnimalRadioimmunoassaySwine--blood