Anyone know anything about E2/ Estrodial/ Estrogen Levels??

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I have been looking online, but to no avail. I am trying to find out what normal/average estrogen levels are during a normal menstrual cycle. Does anyone have this information, or know where I might find it??I'm just trying to find out what the levels should be before ovulation, maybe during, and especially after. Any help would be greatly appreciated! Thanks!!