Very early gestation diagnosis in the sow: determination of the Fα prostaglandin level on days 14 and 15 after artificial insemination M. TERQUI, Françoise MARTINAT-BOTTE and W. W. THATCHERAnn. Zootech., 28 3 (1979) 368DOI: https://doi.org/10.1051/animres:19790345