Theca cell origin – 2 sources: ‐ coelomic epithelium (WT1+) ‐ mesonephros (Gli1+)
Oocyt – GDF9 – granulosa – DHH/IHH – progenitor into theca Gli1+ (2 dpp) Dhh/Ihh‐null mice – theca absence – folicullogenesis disrupted
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