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Theca interna
	File:Mature Graffian follicle.jpg
	Mature late-stage tertiary (Graffian) follicle
	File:Follicle histology.gif
	Early folliculogenesis from primordial to early tertiary.
Latin	tunica interna thecae folliculi

Theca interna cells express receptors for luteinizing hormone to produce androstenedione, which via a few steps, gives the granulosa the precursor for estrogen manufacturing.

After rupture of the mature ovarian follicle, the theca interna cells differentiate into the theca lutein cells of the corpus luteum. These cells secrete estradiol.

[edit] See also

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