Published online by Cambridge University Press: 06 May 2016
All female animals of spontaneously ovulating species show a pattern of behaviour at oestrus wrich differs from that of other times of the oestrous cycle, from the time before puberty and from that when the animal is senescent. This pattern is basically the same in all species but differs in detail from one to another. The matter which is of real interest concerning oestrous behaviour is its association with ovulation. This association is important with regard to the determination of the factors which control both oestrus and ovulation. It is also of immediate interest and importance in the domestic animals because fertility depends on the observation of oestrus, and the the relation thereto of ovulation and insemination.