Models known as "booth babes" are a longtime fixture at the Consumer Electronics Show in Las Vegas. Women's wellness startup Bloom was no exception.

But something was different: Its booth babes had buns in the oven.

bloom booth ces 5557 pregnant booth babesMelia Robinson

San Francisco-based company Bloom makes a wearable device that women in their third trimester can wear to help them track contractions. It operates similarly to a heart rate monitor, passively listening to the body's natural bio-electrical signals. The sensor doesn't transit energy into the belly like an ultrasound, according to Bloom's website.

The wearable syncs with Bloom's smartphone app via Bluetooth, and allows the user to measure the frequency and durations of contractions in real-time. Women can view their contraction history and share that information with their doctor if they'd like.

This information can be helpful as fetal movements provide early indicators of baby's and Mom's health. Sudden swings in the fetus's motions may be a symptom of distress, prompting the mother to seek medical assistance.

bloom booth ces 5550 pregnant booth babesMelia Robinson

Surprisingly, Bloom was the only pregnancy-related startup I saw at CES all week. It's an observation that speaks to the inspiration for and necessity of the company.

"Pregnant moms care more about what's happening to their bodies than anyone in the world," Eric Dy, cofounder of Bloom, tells Tech Insider.

Until now, nothing like Bloom's debut product existed on the market. Doctors often advise pregnant women to be cognizant of their baby's kicks and early contractions, but there's no way to continually, passively collect that data.

bloom booth ces 5544Melia Robinson

Bloom has tested the device's effectiveness against standard hospital-based systems in three separate clinical trials and claims its contraction detection is as accurate. The company even partnered with the Preterm Birth Initiative at University of California San Francisco to support research on pregnancy complications. Users' participation is voluntary.

The app, called Belli, remains in beta. Both the launch date and retail price of the wearable are to be determined.

bloom booth ces 5554 pregnant booth babesMelia Robinson

After speaking to Nikita and Natasha — the two pregnant women at the booth — for five minutes, I could see the startup's potential. Sitting cross-legged in yoga pants at the booth, the women proudly showed me their contraction histories on the app.

The Bluetooth connection brought them a little closer to their bundles of joy.