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Reproductive System (anatomy of all male reproduction structures (penis,…

- - - - proliferative phase - decline of estrogen and progesterone cause the spiral arteries to contract, cell becomes ischemic and die, and are sloughed off or shed
      - secretory phase - in réponse to rising levels of progesterone by the corpus luteum, and uterus becomes ready for pregnancy
  - - - luteal phase - when a follicle expels the oocyte, the empty shell become corpus luteum