The Moment My Pregnancy Shifted

How one question led to a diagnosis I’d never heard of.

I WISH I KNEW

1/27/20263 min read

“I asked one simple question — and everything shifted.”

Going into my second pregnancy, I really thought I had a pretty good idea of what to expect.

I’d done this before. I knew the symptoms, the appointments, the rhythm of it all. I expected things to feel familiar—maybe even easier the second time around.

What I didn’t expect was to come across a pregnancy condition I had literally never heard of.

The belly that felt a little too small

From early on, I remember feeling like my belly was on the smaller side — and that surprised me because everyone always says the second pregnancy shows sooner and bigger.

But I felt like I didn’t look as far along as I actually was. And honestly, people would compliment me all the time about it.

“You’re carrying so cute!”
“You don’t even look that far along!”
“I can’t believe you’re pregnant with your second!”

Which sounds nice… but in the back of my mind I kept wondering if the baby was growing the way it should.

I tried not to overthink it because every pregnancy really is different, and I didn’t want to be the anxious mom who panics about everything.

But eventually I couldn’t help it — I asked.

The question that brought up the diagnosis

At one of my appointments I asked:

“Is the baby’s size normal for how far along I am?”

That’s when my OB told me the baby was measuring on the smaller side, and then she explained why. That was the first time I heard the term:

Marginal cord insertion.

And of course I immediately thought… What in the world is that?

What is marginal cord insertion?

In simple terms, marginal cord insertion is when the umbilical cord attaches closer to the edge of the placenta instead of the center.

That might not sound like a big deal at first, but it can sometimes affect how efficiently the baby gets nutrients and oxygen — which can lead to slower growth.

There isn’t a treatment that “fixes” it exactly, so most of the time, the plan is simply to monitor growth and watch how baby is doing, then make delivery decisions based on that.

When the plan changed

After another week of watching growth and checking measurements, my OB eventually said she thought the baby would be better off outside of the womb.

So she recommended we schedule a C-section at 38 weeks. And I’ll be honest — I was disappointed.

Not because I didn’t trust the recommendation… but because it meant another C-section, and that wasn’t what I had pictured.

It also brought up some feelings I didn’t totally expect. I had moments where I felt guilty and questioned myself like…

Why can’t my body just do this normally?

It’s such a weird mental thing — because logically I knew I didn’t cause it, but emotionally it’s hard not to internalize.

When he was born

When he arrived, it all made sense.

He was only 4 pounds 11 ounces — just barely making the cutoff to avoid staying in the NICU.

He was tiny… but perfect, my little 'Peanut' like I affectionally call him.

And it was one of those moments where you think: wow, I’m really glad I spoke up and asked that question.

What I wish I knew

I wish I knew marginal cord insertion was even a thing. I wish I knew that a “small belly” isn’t always just a cute comment — sometimes it’s worth asking about.

And most of all, I wish I could go back and tell myself that needing a different plan doesn’t mean my body failed.

Sometimes babies just need a little extra help getting here — and that’s okay!