Figure 5.
Proposed model of the dual control of the onset of oocyte maturation in teleosts by estrogens and progestins acting through GPR30 and mPRα, respectively, at different stages of oocyte development. Phase 1: vitellogenesis and beginning of preovulatory LH surge. Phase 2: oocyte maturation. ? : evidence for pathway preliminary or equivocal. Details of model are described in the text. Redrawn from Pang and Thomas, Dev Biol. 342 (2010) 194–206 [159], Figure 8, and Peyton and Thomas, Biol. Reprod. 85 (2011) 42–50 [174], with permission.