* Increasing levels of Oestrogen stimulate an '''LH surge''' to cause the [[The_Ovary_-_Follicles_-_Anatomy_%26_Physiology|follicle]] to split and release the primary [[The_Ovary_-_Oocytes_-_Anatomy_%26_Physiology|oocyte]]. | * Increasing levels of Oestrogen stimulate an '''LH surge''' to cause the [[The_Ovary_-_Follicles_-_Anatomy_%26_Physiology|follicle]] to split and release the primary [[The_Ovary_-_Oocytes_-_Anatomy_%26_Physiology|oocyte]]. |