Heape

An account of some cases is given by Heape in the Proceedings of the Royal Society, 1897; see also Marshall's text book of "Physiology of Reproduction," 1910.

Married Love: or, Love in Marriage 1918

Heape in the study of "The 'Sexual Season' of Mammals," to which reference has already been made.

Studies in the Psychology of Sex, Volume 3 Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in Women Havelock Ellis 1899

We have to admit, however, that, in the opinion of the latest physiologists of sex, such as Castle, Heape, and Marshall, each sex contains the latent characters of the other or recessive sex.

Studies in the Psychology of Sex, Volume 2 Sexual Inversion Havelock Ellis 1899

Heape, who also believes that "at one period of its existence the human species had a special breeding season," follows Wiltshire in suggesting that "there is some reason to believe that the human female is not always in a condition to breed."

Studies in the Psychology of Sex, Volume 1 The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-Erotism Havelock Ellis 1899

It is an interesting fact, Heape noted, that, notwithstanding menstruation, the seasonal influence, or rut, still persisted in the monkeys he investigated.

Studies in the Psychology of Sex, Volume 1 The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-Erotism Havelock Ellis 1899

Heape distinguishes between the "pro-estrum," or preliminary period of congestion, in female animals and the immediately following "estrus," or period of desire.

Studies in the Psychology of Sex, Volume 3 Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in Women Havelock Ellis 1899

Heape made special inquiries with reference to the two species whose sexual life he investigated.

Studies in the Psychology of Sex, Volume 1 The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-Erotism Havelock Ellis 1899

Heape suggests that this also is "due to the advantages derived from their intimate relations with the luxuries of civilization."

Studies in the Psychology of Sex, Volume 3 Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in Women Havelock Ellis 1899

Heape [92] has most fully and carefully described menstruation in monkeys.

Studies in the Psychology of Sex, Volume 1 The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-Erotism Havelock Ellis 1899

In this work (footnote, p. 71) the author claims that he preceded Professor Yves Delage by some two years in offering a physico-chemical hypothesis in place of determinants, and also asserts that 'the conclusions reached by him in 1901 regarding metabolites and, as we subsequently became accustomed to term them, hormones, and their influence on the germ-cells, have since been enunciated by Heape, Bourne,

Hormones and Heredity J. T. Cunningham 1897