Animalia

Bruce effect            1.   It is also known as pregnancy block effect.        2.  It refers to the spontaneous abortion or reabsorption of the embryo in the female by exposure to an unfamiliar male. Exposure to the odour of a strange male activates a neuroendocrine reflex leading to implantation failure. Whitten effect           1.  In the presence of adult male, his pheromones induce estrus in female.          2.  Female animals undergo estrus synchronization, if a group of female animals housed together with a male or when a male animal introduced into the group of females. Likewise, pheromones produced by male sheep and goats can induce out-of-season ovulation in females (“male effect”). 3. Nearly 50% of the does will be in estrus on the third day after introduction of a buck. Lee-Boot effect           Groups ...