Some of the important theories concerning the activation of egg by sperm are as follows: 1. Bataillon’s Theory 2. Sensitization to Calcium Theory 3. Loeb’s Theory 4. Lillie’s Theory 5. Repressor Theory of Activation. 1. Bataillon’s Theory: Bataillon (1910, 11, 12 and 16) suggested that the exudation or the excretion of substances into the perivitelline […]