Expression data from progesterone receptor knockout versus heterozygous mouse ovaries: cumulus oocyte complexes

Ovulation requires sequential molecular events and structural remodeling in the ovarian follicle for the successful release of a mature oocyte capable of being fertilised. Critical to this process is progesterone receptor (PGR), a transcription factor highly yet transiently expressed in granulosa cells of preovulatory follicles. Progesterone receptor knockout (PRKO) mice are anovulatory, with a specific and complete defect in follicle rupture. Therefore, this model was used to examine the critical molecular and biochemical mechanisms necessary for successful ovulation.

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Akison LK, Robertson SA, Gonzalez MB, Richards JS, Smith CW, Russell DL, Robker RL