“…Saji (1967) who used the haemagglutination-inhibition assay for measuring prolactin. These results differ substantially from those reported by Arai & Lee (1967) (Johke, 1970) and hand milking in the goat (Hart, 1972) (Bryant & Greenwood, 1968;Davis et al, 1971;Cumming, Brown, Goding, Bryant & Greenwood, 1972) Prolactin levels are expressed in ng/ml plasma. 1965; Bryant, Linzell & Greenwood, 1970;Johke, 1970;Neill, 1970;Butler, 1971;Raud, Kiddy & Odell, 1971;Cumming et al, 1972;Frantz, Kleinberg & Noel, 1972;Fell, Findlay, Cumming & Goding, 1973 (1971) and Fell et al (1972).…”