Miranda Kerr thought she'd die giving birth

Miranda Kerr's baby is beautiful, and her bod is back to perfection after giving birth to her and Orlando Bloom's son, Flynn.

But the actual labor?

A nightmare. Here's how she puts it:

MORE: Miranda hits the runway while preggers

"I actually thought I was going to die at one point and left my body," Kerr tells Australian InStyle, which she graces the cover of this month. " I was looking down on myself, the pain was so intense."

The 28-year-old had previously only described the birth in vague terms, calling it "long and difficult."

It's a boy for Kerr, Bloom

Now, she tells the real deal behind how her natural childbirth felt.

"I kept thinking, 'How do women do this?' But if other women have done this, I can do it too. I was determined," she tells the mag.

And although the model mom quickly bounced back to her pre-baby Victoria's Secret bod, she said she would have been OK had that not been the case.

Pregnant Miranda Kerr hits runway

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"Flynn is a big baby...and I thought to myself, 'I have so much more that I want to do aside from modeling," she said. "I can live with my body not being in shape if I have a healthy son. It's worth it."

Her hubby isn't just a pretty face either--Kerr calls Bloom a hands-on dad.

Pregnant Miranda Kerr gets naked for W mag

"It's whoever has their hands free. When I'm not working we don't have a nanny," she says.

And if Kerr, who is currently working on a new David Jones summer campaign, needs to jet off to work, she pumps her breastmilk beforehand and puts it in the freezer for daddy to feed to Flynn later.

We'd certainly call that hands-on.

MORE: These stars rocked baby bumps