* Follicular growth and [[Female_Reproductive_Tract_-The_Ovary_-_Anatomy_%26_Physiology#Corpus_Luteum_Regression|regression of the corpus luteum]] of the previous cycle (in polyoestrous species). | * Follicular growth and [[Female_Reproductive_Tract_-The_Ovary_-_Anatomy_%26_Physiology#Corpus_Luteum_Regression|regression of the corpus luteum]] of the previous cycle (in polyoestrous species). |