Intrusive thoughts in the perinatal period: why they happen and why they don’t mean you’re a bad mum

“What if I drop my baby?”

“What if I accidentally hurt them?”

“Why did that awful image just pop into my head?”

If you’ve experienced thoughts like these during pregnancy or after your baby was born, you’re not alone.

Many parents are terrified to admit they’ve had intrusive thoughts because they’re frightened someone will think they’re dangerous, or that their baby could be taken away. The shame can be overwhelming.

The truth is that intrusive thoughts are one of the most common – and misunderstood – experiences during the perinatal period.

What are intrusive thoughts?

Intrusive thoughts are unwanted, distressing thoughts, images or urges that seem to appear out of nowhere. They are usually completely opposite to what you want or believe.

For new parents, they often involve accidental or intentional harm coming to the baby, such as imagining dropping them down the stairs, seeing disturbing images of them being injured, or suddenly wondering, “What if I did something to hurt them?”

These thoughts can feel incredibly vivid and upsetting. But having a thought is not the same as wanting to act on it.

In fact, the reason these thoughts feel so distressing is because they go against everything you stand for as a parent.

How common are they?

Far more common than most people realise.

Research suggests that around 70–100% of new parents experience unwanted intrusive thoughts, and between one-third and one-half experience thoughts involving intentionally harming their baby, despite having absolutely no desire to do so. (PMC)

Many parents never talk about them because they worry they will be judged.

Unfortunately, silence often leads people to believe they’re the only one experiencing them.

Why do intrusive thoughts happen?

Although they can feel frightening, intrusive thoughts are thought to be linked to our brain’s threat detection system.

When you become a parent, your brain becomes highly attuned to keeping your baby safe. It constantly scans for possible dangers. Sometimes that protective system becomes overactive, throwing frightening “what if…” scenarios into your mind.

Several factors can make intrusive thoughts more likely, including:

• Hormonal changes

• Sleep deprivation

• Anxiety

• A traumatic birth

• Previous anxiety or OCD

• The enormous responsibility of caring for a tiny, vulnerable baby

In many ways, intrusive thoughts are a sign that your brain is trying—rather clumsily—to protect what matters most to you.

The question almost every mum asks…

“What if having these thoughts means I’ll act on them?”

This is one of the biggest fears parents have.

The evidence is incredibly reassuring.

Research consistently shows that unwanted intrusive thoughts on their own do not increase the risk of someone harming their baby. Parents experiencing these thoughts find them distressing precisely because they don’t want them, and they almost always go to great lengths to prevent harm. (PubMed)

What can help?

If intrusive thoughts are causing you distress, there are effective ways to manage them.

1. Remember that thoughts are just thoughts

Our minds generate thousands of thoughts every day. Not all of them are meaningful or true.

You don’t have to believe every thought your brain produces.

2. Try not to fight the thoughts

The more we try to suppress intrusive thoughts, the more persistent they often become.

Instead of arguing with them, notice them, acknowledge them, and allow them to pass without giving them extra attention.

3. Reduce reassurance seeking

It’s natural to want constant reassurance that you’re a good parent.

However, repeatedly checking, asking others for reassurance, or avoiding situations can unintentionally keep the cycle going.

4. Prioritise rest and support

Sleep deprivation, stress and overwhelm can all make intrusive thoughts feel louder.

Accepting help, resting where possible and looking after your own wellbeing really does matter.

5. Talk to someone

You don’t have to carry this alone.

Speaking with a therapist who understands perinatal mental health can help you understand what’s happening, reduce the fear surrounding the thoughts and learn strategies to stop them taking over your life.

You’re not a bad mum

One of the cruellest things about intrusive thoughts is that they target what you care about most.

They don’t mean you’re dangerous.

They don’t mean you secretly want to harm your baby.

They don’t define you as a parent.

If anything, the distress they cause often reflects just how deeply you love your child.

If you’re struggling with intrusive thoughts during pregnancy or after birth, know that you’re not alone—and you don’t have to navigate them by yourself. With the right support, they can become much less frightening and much more manageable.