Some aspects of oestrum in cattle, with reference to fertility on artificial insemination. 1. The pattern of oestrus cycles

Abstract

Aspects of the incidence of oestrum, together with fertility data, have been investigated in Jersey cows in south-eastern Queensland. The observations reported here are considered of importance in relation to the overall pattern of infertility in the area concerned, with particular reference to ovarian dysfunction, which hitherto has been regarded as being characterised mainly by anoestrum.