Related Q: Does anybody have (sourced) scientific knowledge of when female "peak fertility" occurs?

For those unfamiliar with the concept: https://therationalmale.com/2012/07/18/the-wall/.

Edit: The essay that I linked to emphasizes the centrality and extreme importance of The Wall in our "feminized society":

[I]n an intergender social context, the Wall became individualized and subjective for women, and it’s within this framework that women like S are most comfortable in addressing the reality of the Wall. “Not all women are like that” (NAWALT), the go-to mantra of feminized subjectivity, is a direct result of subjectivizing the inevitability of the Wall. In fact, virtually every operative social convention women rely upon for empowerment and self-esteem finds its root purpose in avoiding the fear of the Wall. The Myth of Sexual Peak, the Myth of the Biological Clock, the social convention that Women are just as Sexual as Men, are all very complex social rationales with the latent purpose of convincing the majority of men and women alike that post-Wall women can still be equally effective sexual competitors with pre-Wall women.

It’s important to bear in mind that all of these complex social conventions are rooted in a fear of the Wall. I’m repeating this point to emphasize the importance this has in a feminized society that’s subjected to feminine hypergamy as its most operative doctrine. When enough women, through cultural forces or personal circumstance, can’t capitalize upon what they think is their due, optimal hypergamic male option, then society must be acculturated to believe that women past their Wall expiration date can and should be just as desirable as those in their prime. Think of it as a retroactive social moving of the feminized goalposts. This is the gravity and extent that the fear of the Wall plays for women – feminized society is literally structured around avoiding it.