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Corpus Luteum. Following ovulation and still under the influence of LH, the cells of the ovulated follicle "restructure" to form the Corpus Luteum. As a result of hypertrophy and hyperplasia, the corpus luteum is much larger than the original follicle. The granulosa cells become the Granulosa Lutein cells (G) which occupy the bulk of the organ and are centrally located. The cells of the theca interna become the Theca Lutein (yellow arrows) and occupy the periphery of the corpus luteum. These cells are smaller than those of the granulosa lutein thus the nuclei are closer together and appear somewhat darker.