Andrew Huberman· PhD
So the body says, oh, I don't need this lining that I've been preparing, I'm going to shed it. So now progesterone and estrogen start crashing, and the lining is what is being shed, and that is the menses.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
So the body says, oh, I don't need this lining that I've been preparing, I'm going to shed it. So now progesterone and estrogen start crashing, and the lining is what is being shed, and that is the menses.
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Levels of progesterone in the second half of the ovulatory cycle are going to increase by 1,400 fold compared to what they were in the first half of the ovulatory cycle.
and then as we start to go towards now the follicular phase gluteal phase which is the second half of the cycle from days 14 to 28. now things you know the estrogen starts to dip as you can see that we have a quite a bit of a dip afterwards after we ovulate um progesterone starts to come down and then it goes up and that's cc on the day 21 that is when it's the highest
progesterone is rising again rising and by about day 21 when progesterone Peaks the body figures out if it's pregnant or not and again in most cases it's not and so because it's not pregnant it begins to rapidly drop that progesterone level