Changes

* Granulosa cells of the [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|ovulated]] [[The_Ovary_-_Follicles_-_Anatomy_%26_Physiology|follicles]] give rise to lutein cells, which are responsible for the [[The_Ovary_-_Corpus_Luteum_Formation_-_Anatomy_%26_Physiology|formation of the corpus luteum]] (luteinisation).

* Granulosa cells of the [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|ovulated]] [[The_Ovary_-_Follicles_-_Anatomy_%26_Physiology|follicles]] give rise to lutein cells, which are responsible for the [[The_Ovary_-_Corpus_Luteum_Formation_-_Anatomy_%26_Physiology|formation of the corpus luteum]] (luteinisation).

* Progesterone secretion is detectable soon after [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|ovulation]], with significant quantities produced in 2-5 days.  This marks a transition from oestrogen to progesterone dominance.

* Progesterone secretion is detectable soon after [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|ovulation]], with significant quantities produced in 2-5 days.  This marks a transition from oestrogen to progesterone dominance.

* Reduction in secretion from [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology#Histology|uterine]], cervical and [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology#Vagina_2|vaginal glands]].

* Reduction in secretion from [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology#Histology|uterine]], [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology#Histology|cervical]] and [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology#Vagina_2|vaginal glands]].

=== Dioestrus ===

=== Dioestrus ===