AI Knows Her Menstrual Cycle Purchases. Does Your Marketing?

Buyer personas aren’t static—they evolve in real time. This post explores how AI and system thinking can capture dynamic shifts in behavior (yes, even down to menstrual cycle patterns) to create hyper-relevant marketing that feels human, not generic.

3 min read

Now that you already know from my previous blog post [hyperlink inserted] that I’m ready to get my hands dirty—and that keeping our promises is the only way to actually deliver what we want to sell so BADLY—let’s rewind to what many marketers consider the beginning of the journey: defining your ideal persona.

Most companies (depending on their budget) still build personas the old way: “Sophie, 32, lives in Florida, works in HR, drives a Prius, likes yoga, reads The New Yorker.” Relevant? Sure. But static. These dusty slides get updated once a year—if ever. And you, as a human in 2025, know we are anything but static. We are shaped by cultural baggage (yes, including those generational traumas), tech shifts (hello, Apple drop lines), and personal circumstances that can flip overnight. One bad night of sleep can turn me into someone my Oura ring thinks it has the right to boss around. And yes, I obey.

The truth? A static persona can’t keep up. And if your persona can’t keep up, neither will your brand.

From Static to Dynamic: A Systems Thinking Lens

As I carve my path through brands with a systems-thinking lens, I get excited to dissect those Static Personas and transform them into Dynamic Personas. People are nodes in a web—pulled by culture, networks, triggers, environments, tech, and (to be real honest) even something as intimate as where we are in our menstrual cycle. Don’t laugh—we’ve all had those “why did I even buy this?” moments.

And here’s the kicker: women aren’t just harder to market because of more phases—we also represent massive buying power. Consider this: women drive the majority of consumer spending and control 51% of personal wealth. Ignore that system, and you’re ignoring the face of wealth itself.

Dynamic personas evolve in real time with signals like:

· Emerging TikTok trends,

· Sudden life events (graduation, breakup, job loss, new parenthood),

· Shifts in mood, preferences, or attention span.

Each new signal is a ripple in the web—an opportunity for brands to catch or miss.

Sophie 2.0: A Persona in Motion

Our Sophie, HR pro in Florida, doesn’t just exist in a slide deck. She listens to rap on Mondays, reggaeton on Fridays, meditation tracks on Sundays. She buys mid-priced skincare until a TikTok rosemary-oil craze pulls the web and she ditches her serum. Friends see results → more nodes move. Brands tuned into the ripple win. Static brands lose her.

That’s the difference: static persona = knot in the web. Dynamic persona = knot + web + every ripple moving it.

The AI Layer: From Sci-Fi to Right Now

Here’s where it gets nerdy (don’t hate the player, hate the game). With AI and integrated data streams, dynamic personas are already here:

  • YouTube doesn’t market to you as “29, male.” It sees your behavioral web: motivational clips at 6 AM, finance gurus by lunch, and stand-up comedy at midnight.

  • Netflix doesn’t care about your job title. It predicts your next binge by your system of behavior.

  • Wearables and IoT add even deeper context: imagine your ring detects poor sleep → suddenly you’re served an ad for a meditation app (helpful) or a quick-fix sleep drug (questionable).

That’s ultimate personalization: not just who you are, but how you feel right now.

⚠️ Of course, with great power comes great responsibility. Consent, transparency, and frequency caps matter. Otherwise, “dynamic” crosses into “creepy.”

The Payoff: Growth Smarter, Not Louder

Dynamic personas aren’t just a marketing upgrade—they’re growth engines. Done right, they reduce wasted spend, improve conversion lift, cut churn, and increase LTV (that’s lifetime value—the total $$ a brand can squeeze out of one loyal customer over time).

I’ve realized the long-term strategy isn’t about knowing a persona once. It’s about listening so deeply, in real time, that your persona feels alive—breathing with your brand, reacting to your message, and ultimately moving with you toward the final goal: conversion, loyalty, advocacy.

The grand finale? You finally get to deliver what you wanted so BADLY (or GOODLY) to sell. But no matter how advanced AI gets, one thing won’t change: the responsibility in our hands. The question is, how do we want to get them dirty?

Topic: Brand: Buyer Persona (How businesses benefit from buyer personas?)