Why Pelvic Pain Isn’t Random in Pregnancy (And What It’s Actually Telling You)

Understanding Strength, Coordination & Load in Your Changing Body

Pelvic pain in pregnancy can feel confusing.

It might start earlier than you expected.
It may feel one-sided.
It may worsen with walking, rolling in bed, or standing on one leg.

And often, no one explains why.

Pelvic pain isn’t random.

It’s information.

Your body is adapting to significant structural change and how that change is managed determines how comfortable you feel.

Pregnancy Changes Load Distribution

As pregnancy progresses:

• Your rib cage expands

• Your centre of mass shifts forward

• Hormones influence tissue tension

• Your pelvis subtly reorients

These changes are normal.

But as pressure increases through the abdomen and pelvis, your body has to redistribute load differently.

If there are existing compensation patterns or certain muscles not contributing efficiently, that rising pressure tends to highlight them.

Instead of load being evenly shared, some structures begin to absorb more strain than they should.

Most commonly:

• The SI joints

• The pubic symphysis

• The deep hip stabilisers

That’s when pelvic girdle pain often shows up.

It’s Usually Strength and Coordination

Pelvic pain is usually a combination of recruitment imbalance and strength capacity.

Some muscles are overworking.
Others are under-contributing.
And the system loses coordination under load.

And here’s what often happens:

Some muscles begin to over-recruit:

• Deep hip rotators gripping for stability

• Adductors trying to control pelvic motion

At the same time, others may under-recruit or lose strength over time:

• Hamstrings not contributing evenly

• Lower abdominals struggling to manage pressure

• Glutes not lengthening or loading effectively

When the right muscles aren’t switching on at the right time or aren’t strong enough to tolerate load,
other muscles step in to compensate.

That compensation can create:

• Asymmetrical pelvic positioning

• Increased joint sensitivity

• Increased abdominal pressure

Pain becomes the signal that load isn’t being distributed well.

Common Patterns I See

In pregnancy, pelvic pain frequently involves:

• One hamstring doing more work than the other

• A subtle pelvic torsion pattern (one side slightly forward)

• Adductor weakness

• Limited rib cage mobility & expansion affecting pressure control

• Lower abdominal doming under load

• Deep hip rotator tension contributing to gripping

None of this means your body is failing.

It means it’s trying to stabilise with the tools it currently has.

Pressure Matters More Than Most Women Realise

As your baby grows, intra-abdominal pressure increases.

If that pressure isn’t managed well, for example, if you:

• Have limited rib cage mobility

• Grip into the upper abdominals for stability
• Overuse upper body (chest, shoulders, neck) when inhaling

• Dome through the abdominal wall

• Brace excessively without coordination

the pelvis takes more strain. 

Pressure management is not about doing less.

It’s about sequencing:

Breath → abdominal engagement → load.

When that sequence improves, the pelvis feels more supported.

This Is Why Assessment Matters

Pelvic pain cannot be solved with generic stretching.

Nor is it resolved by simply “strengthening your core.”

What matters is:

• Which muscles are dominant

• Which are under-contributing

• How your ribs and pelvis relate

• How you manage load

• How you breathe

When we improve:

• Muscle sequencing

• Rib cage mobility

• Hamstring and glute contribution

• Lower abdominal timing

• Pressure control

Strength improves in the right places.
Coordination improves under load.
And pain often reduces.

Why This Matters for Birth & Recovery

Pelvic stability during pregnancy isn’t just about comfort now.

It influences:

• How you create space & maintain mobility in your pelvis

• How your body supports your baby moving through your pelvis

• How well you are able to connect to the pelvic floor

• How well your body transitions into recovery

If load isn’t well managed in pregnancy, these patterns can and most often do, show up postnatally.

This is why preparation matters.

How AlignBirth Supports This

Inside AlignBirth, we focus on:

• Corrective exercise for pelvic pain

• Breath-led pressure management

• Birth biomechanics

• Postnatal rehabilitation

Because pelvic pain isn't something to push through, it’s something to understand.

And when you understand it, you can change it.

Pelvic pain isn’t random.

It’s information.
And information gives you direction.

If you have any questions of the back of this blog, please don't hesitate to reach out.