00824naa a2200169 a 450000100080000000500110000800800410001910000130006024500530007326000090012652003870013565000110052265000240053365300190055770000190057677300590059520789882017-11-07       1968    bl uuuu     u00u1 u    #d1 aBOYD, H.  aA device for the detection of oestrus in cattle.  c1968  aKaMaR heat-mount detectors were fitted to 40 Ayrshire heifers during a 104-day period; 144 heats were recorded. In only one of 61 heats in which standing estrus was seen did the KaMaR not become red. There was more variation in cycle lengths between successive red KaMaRs than between successive standings. Of 5 animals inseminated on the basis of red KaMaR only, 3 became pregnant.  aCattle  aPregnancy diagnosis  aOestrous cycle1 aHIGNETT, P. G.  tThe Veterinary Recordgv. 83, n. 1, p. 2-3, Jul. 1968.