Most parents can hear their baby heartbeat during pregnancy around 6–7 weeks using ultrasound technology. At this stage, the baby’s developing heart is beating strongly enough to be detected during a pregnancy ultrasound. As the baby grows, the heartbeat becomes clearer and easier to hear during prenatal scans.
Pregnancy is filled with unforgettable milestones, but hearing your baby’s heartbeat for the first time is one of the most emotional moments for many parents.
That tiny rhythm confirms that a new life is growing and developing inside the womb. For many families, hearing their baby heartbeat during pregnancy brings excitement, reassurance, and a powerful emotional connection with their baby. Understanding when the heartbeat begins, how ultrasound detects it, and what to expect during a scan can help parents appreciate this incredible stage of pregnancy.
When Does a Baby’s Heart Start Beating?
Your baby’s heart begins forming very early in pregnancy. Around week 5, a tiny tube develops that will eventually become the heart. This early structure begins beating and pumping blood through the embryo as the baby’s circulatory system begins to form.
At this stage, the heartbeat is extremely small and may not yet be detectable during an ultrasound. However, it marks an important milestone in early fetal development.
As the pregnancy progresses, the heart continues to develop chambers and becomes stronger. Within the next few weeks, the heartbeat becomes strong enough to be detected during a pregnancy ultrasound.
What Week Can You Hear Your Baby’s Heartbeat?
Most parents can hear their baby’s heartbeat between 6 and 7 weeks of pregnancy using an ultrasound. At this stage, the developing heart begins beating strongly enough to be detected during an early pregnancy scan.
In some cases, the heartbeat may be easier to detect closer to 8–10 weeks, depending on the baby’s position and the timing of the ultrasound.
Typical detection timeline:
- 6–7 weeks: Ultrasound may detect the heartbeat
- 8–10 weeks: The heartbeat becomes easier to detect
- 10–12 weeks: Doppler devices may allow parents to hear it clearly
Seeing the tiny flicker of a fetal heartbeat ultrasound is often one of the most reassuring and emotional moments for expecting parents.
How Ultrasound Detects Your Baby’s Heartbeat
A pregnancy ultrasound heartbeat scan uses sound waves to produce images of your baby inside the womb. These sound waves can detect the movement of the tiny beating heart. Trained ultrasound technicians observe this motion to confirm early development.
Early Ultrasound
During early pregnancy, the heartbeat might look like a small flicker on the ultrasound screen. This flicker shows the heart starting to pump blood through the baby’s developing body.
Doppler Monitoring
Later in pregnancy, healthcare providers may use a Doppler device that lets parents hear the baby’s heartbeat ultrasound sound, which is often described as a fast “whooshing” rhythm.
Advanced Ultrasound Imaging
As pregnancy advances, technologies like 3D, 4D, and 5D ultrasound produce clearer images of the baby. These scans enable parents to see their baby moving, stretching, and growing. Such experiences often become a meaningful ultrasound bonding moment for families.
What Does a Baby’s Heartbeat Look Like on Ultrasound?
During an early baby heartbeat ultrasound, the heartbeat often appears as a tiny flickering movement inside the embryo.
Because the baby is still very small at this stage, parents may see the heartbeat as a flashing motion rather than hearing a sound immediately.
As the baby grows, ultrasound imaging becomes clearer and more detailed. Advanced scans such as 3D, 4D, and 5D ultrasound allow parents to see their baby moving, stretching, and even making facial expressions.
Watching that tiny flicker on the screen often becomes one of the most meaningful moments in pregnancy.
How Fast Should a Baby’s Heartbeat Be?
A baby’s heartbeat is much faster than an adult’s. This is completely normal because the baby’s body develops rapidly.
Typical fetal heart rate ranges include:
• 6–7 weeks: 90–110 beats per minute
• 9–10 weeks: 140–170 beats per minute
• Second trimester: 120–160 beats per minute
These variations are normal and often fluctuate with the baby’s movement and development stage.
During a pregnancy ultrasound, hearing this steady rhythm can reassure parents that their baby is developing normally.
Can You Hear Your Baby’s Heartbeat at Home?
Some parents are interested in hearing their baby’s heartbeat at home. Although home Doppler devices are available, it can sometimes be challenging to detect the heartbeat without professional training.
Several factors may affect whether the heartbeat can be heard:
• The baby’s position in the womb
• How early the pregnancy is
• The type of device being used
Professional baby heartbeat ultrasound scans performed by trained technicians usually provide the most reliable results.
What If the Heartbeat Is Hard to Find?
Sometimes the heartbeat may not be detected during the earliest ultrasound.
This can happen for several common reasons:
• The pregnancy may be earlier than expected
• The baby’s position may make detection difficult
• The ultrasound may have been done very early
In many cases, healthcare providers recommend another ultrasound one or two weeks later. Because early pregnancy development happens quickly, the heartbeat often becomes easier to detect shortly afterward.
Why Parents Across Canada Choose UC Baby
At UC Baby, we recognize how significant pregnancy milestones are for families. Our ultrasound sessions aim to foster meaningful bonding moments between parents and their baby.
Families across Canada choose UC Baby because we offer:
• Advanced 3D, 4D, and 5D HD ultrasound technology
• Trained and experienced ultrasound technicians
• Comfortable bonding environments for families
• Clear baby ultrasound images
• Convenient locations across Canada
Many parents visit UC Baby to celebrate milestones such as a Heartbeat Vitality Check, 3D/4D/5D ultrasound, or Gender Reveal ultrasound.
These sessions allow parents to experience the joy of seeing their baby before birth.
Frequently Asked Questions
When can you hear your baby’s heartbeat during pregnancy?
Most pregnancies allow a baby’s heartbeat to be detected via ultrasound around 6–7 weeks. As pregnancy advances, the heartbeat becomes stronger and easier to hear.
What does a baby’s heartbeat sound like?
A baby’s heartbeat usually sounds like a rapid “whooshing” rhythm and generally falls between 110 and 170 beats per minute.
Is it normal if the heartbeat isn’t detected early?
Yes. Sometimes the pregnancy might be earlier than expected, or the baby’s position makes detection difficult. A follow-up ultrasound is often recommended.
Can ultrasound show the baby’s heartbeat?
Yes. A pregnancy ultrasound heartbeat scan can display the movement of the beating heart and confirm early fetal development.
Can hearing the heartbeat help parents bond with their baby?
Yes. Hearing the heartbeat often helps parents feel emotionally connected to their baby and enhances early bonding experience.
Conclusion
Hearing your baby’s heartbeat during pregnancy is one of the most powerful and reassuring moments for expectant parents. That tiny rhythm signals the start of your baby’s development and fosters a meaningful emotional connection.
Experiences like ultrasound scans enable families to celebrate these milestones and cherish the joy of seeing their baby before birth.
A UC Baby ultrasound session offers parents the opportunity to witness these special moments while creating lasting memories with their growing family.
Invite families and friends to witness this memorable event of your pregnancy. Celebrate that special child-bonding moment with your loved ones, wherever they are in the world.
There is nothing more beautiful than your baby's heartbeats. Save that sound forever in a UC Baby® Heartbeat Bear®. It's not just a great keepsake, but also an effective way to sooth your baby to sleep.