* Increasing levels of Oestrogen stimulate an '''LH surge''' to cause the [[The_Ovary_-_Follicles_- Anatomy & Physiology|follicle]] to split and release the primary [[The_Ovary_-_Oocytes_- Anatomy & Physiology|oocyte]]. | * Increasing levels of Oestrogen stimulate an '''LH surge''' to cause the [[The_Ovary_-_Follicles_- Anatomy & Physiology|follicle]] to split and release the primary [[The_Ovary_-_Oocytes_- Anatomy & Physiology|oocyte]]. |