Short answer: Technically the device turns on, but without gel you'll mostly hear static. Ultrasound gel removes the air between the probe and your skin so sound can travel. When you run low, any standard ultrasound gel works best.
Why gel matters
Sound waves don't travel well through air. Even a thin gap between the probe and your belly blocks most of the signal. Gel fills that gap, so you can hear clearly and find the heartbeat more easily. That's true for any home doppler, including ours.
Which gel works for a fetal doppler
- Ultrasound gel — the same kind used at prenatal visits. Use a generous amount.
- A thick moisturizing cream in a pinch — some moms try it, but results vary and gel is more reliable. Check your device's instructions first.
What to avoid
- Water-thin lotions that dry quickly.
- Anything that irritates your skin.
- Products that could damage the probe; check your device's instructions.
How much to use
More than you'd think: a layer about the size of the probe face, reapplied as you move. If you hear static, add gel before anything else. Still hearing mostly whooshes and static? See how to tell baby's heartbeat from your pulse or the placenta.
Gel in every kit
Every Nooliva kit includes ultrasound gel, along with the doppler, a soft pouch and batteries. The Complete kit adds a 250 ml bottle of gel (shipped separately), so you won't run short. See our at-home fetal doppler kit, and our step-by-step guide to using a fetal doppler at home for placement tips.
If you're ever worried, call your healthcare provider.
Not a substitute for prenatal care.