Recently Engelmann (96o) compared various internal and exter- nal tactors which affect the activity o the corpora allata in Leuco- phaea maderae Fabricius) and Diplotera punctata (Eschscholtz). In these two species the stimuli resulting trom mating, ood intake, gesta- tion, and parturition differed in the degree to which they influenced production ot gonadotropic hormone.
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Roth et al. (1962) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: