Estrus cycle Category page Create Classic editor Talk0 This page needs content. You can help by adding a sentence or a photo. Add to this page!orSearch for "Estrus cycle" “The Vandenbergh effect is a phenomenon reported by J.G. Vandenbergh et al. in 1975, in which an... Vandenbergh effect Pages in category "Estrus cycle" This category contains only the following page. V Vandenbergh effect Retrieved from "http://psychology.wikia.com/wiki/Category:Estrus_cycle"