There is a particular kind of panic that happens when a woman says:
“I don’t recognize my thoughts.”

It might be during pregnancy.
It might be after bringing a baby home.
It might be at 42, waking at 3:17 a.m. in a perimenopausal sweat spiral.

And the thought itself?
Disturbing.
Violent.
Blasphemous.
Sexual.
Catastrophic.
Unwanted.

The shame comes fast.

But here’s what I want you to know:
Hormones do not create your values.
They amplify your nervous system.
And when the nervous system is amplified, the mind produces more “what if” simulations.

In my work as a registered clinical psychologist supporting women through pregnancy, postpartum transitions, and perimenopause, this moment — the fear of one’s own thoughts — is more common than people realize.

Research consistently shows that the majority of people experience unwanted intrusive thoughts at some point in their lives (Rachman, 1997). These thoughts can include harm, taboo, or catastrophic themes.

In fact, studies of new mothers show that 70–100% report intrusive thoughts about accidental or intentional harm coming to their baby (Fairbrother & Abramowitz, 2007; Abramowitz et al., 2010).

Yes. Up to 100%.

The difference between a passing intrusive thought and OCD is not the content.

It’s the meaning assigned to it.

These patterns often show up as intense self-monitoring, fear of losing control, or shame about thoughts that feel deeply out of character — particularly among conscientious, high-responsibility women.

During pregnancy and postpartum, estrogen and progesterone fluctuate dramatically. These hormones interact closely with serotonin and GABA systems — both deeply involved in anxiety regulation.

Similarly, during perimenopause, estrogen variability (not just decline) has been linked to:

• Increased anxiety
  
• Sleep disturbance
  
• Mood reactivity
  
• Cognitive sensitivity to threat
  

Research suggests hormonal transitions are “windows of vulnerability” for anxiety disorders, including OCD (Guglielmi et al., 2014; Russell et al., 2013).

In other words:

If you are wired to be conscientious, responsible, protective, and thoughtful…
Hormonal shifts may temporarily turn the volume up on those traits.

The brain becomes hypervigilant.
And OCD loves hypervigilance.

This is one reason hormonal life stages — pregnancy, postpartum, and perimenopause — often bring women into therapy for anxiety, intrusive thoughts, or OCD symptoms that previously felt manageable.

When estrogen fluctuates, the amygdala (your brain’s threat detector) becomes more reactive. Sleep disruption — common in both postpartum and perimenopause — further reduces prefrontal regulation.

Translation:

Your brain becomes better at detecting threat and worse at dismissing it.

So when a random intrusive thought appears (“What if I drop the baby?” or “What if I drive into traffic?”), the anxious brain asks:

“Why would I think that if it weren’t true?”

This is called thought-action fusion: a well-documented cognitive distortion in OCD (Rachman, 1993).

But here’s the truth: The presence of a thought is not evidence of intent.

In fact, the more horrified you are by a thought, the more it tells me it violates your values.

This distinction matters.

In postpartum OCD:

• Thoughts are intrusive and unwanted.
  
• Insight is intact.
  
• The mother is distressed and actively trying to prevent harm.
  

In postpartum psychosis:

• There may be delusional beliefs.
  
• Insight is impaired.
  
• There is elevated risk and psychiatric emergency.
  

The research is clear: mothers with intrusive harm obsessions who are distressed by them are not at increased risk of harming their infants (Abramowitz et al., 2006).

Shame keeps women silent.

Science tells a different story.

Many women who had mild anxiety in their 20s experience a resurgence in their 40s.

Why?

Hormonal variability + sleep disruption + life stress + high responsibility load.

Perimenopause is not just hot flashes.

It is a neurobiological transition.

Estrogen modulates serotonin receptors. When levels fluctuate, some women experience increased rumination, catastrophic thinking, and intrusive imagery.

And because women in midlife often carry immense cognitive load — caregiving, careers, aging parents — the content of intrusive thoughts often centers around:

• Health anxiety
  
• Responsibility fears
  
• Catastrophic “what if” spirals
  

Again, the content is not the issue.

The interpretation is.

OCD is maintained by attempts to feel certain.

Avoidance.
Reassurance.
Mental reviewing.
Googling.
Confessing.
Checking.

Short-term relief.
Long-term reinforcement.

Exposure and Response Prevention (ERP), the gold-standard treatment, works because it teaches the brain:

• Thoughts are tolerable.
  
• Anxiety rises and falls.
  
• Certainty is not required for safety.
  
• You can trust yourself without 100% reassurance.
  

And yes — ERP is highly effective in postpartum and hormonally triggered OCD presentations.

If you are in pregnancy, postpartum, or perimenopause and experiencing intrusive thoughts:

It does not mean you are unstable.
It does not mean you secretly want harm.
It does not mean you are unsafe.

It means your nervous system is sensitized.

Hormones shift.
Sleep fragments.
The brain scans harder.

But your values remain intact.

• The thought is not the problem.
  
• The shame is optional.
  
• Avoidance feeds the loop.
  
• You can learn to ride the wave.
  
• This is treatable.
  

We do not eliminate intrusive thoughts.

We eliminate the fear of them.

And when fear drops, frequency often drops too.

Women are often told:
“It’s just hormones.”

I disagree.

Hormones matter profoundly.

But not because they make you irrational.

Because they temporarily change how your brain processes threat.

And when we understand that — biologically, psychologically, compassionately — we remove shame from the equation.

If your mind feels louder than usual during a hormonal transition, it is not a personal failure.

It is a nervous system state.

And states can change.