What Does A Baby Heartbeat Sound Like In The Womb

Ultrasound image of baby in womb

One of the most exciting moments for expectant parents is hearing their baby’s heartbeat for the first time. It’s an indication that their little one is healthy and growing. But what does a baby heartbeat sound like in the womb?

How Does A Baby’s Heartbeat Develop?

Baby heart development

A baby’s heart begins to form just three weeks after conception. By the time the mother is six weeks pregnant, the baby’s heart is fully formed and beating. At this stage, the heartbeat is very rapid, around 110 beats per minute (BPM).

As the pregnancy progresses, the baby’s heart rate slows down. By the end of the first trimester (12 weeks), the average heart rate is between 120 and 160 BPM. This is the range that most people are familiar with when they think of a baby’s heartbeat.

What Does A Baby Heartbeat Sound Like?

Stethoscope on pregnant belly

A baby’s heartbeat sounds like a fast-paced, rhythmic thumping. It can be likened to the sound of galloping horses or a train chugging down the tracks. The sound is often described as “whoosh-whoosh-whoosh.”

The sound of the baby’s heartbeat is best heard using a fetal doppler or an ultrasound machine. It can also sometimes be heard using a stethoscope, but this is less reliable and can be tricky to find the right spot.

What Affects A Baby’s Heartbeat?

Baby in womb stressed

There are several factors that can affect a baby’s heartbeat. These include:

  • Stress: If the mother is stressed, the baby’s heart rate may increase.
  • Activity: If the baby is active, their heart rate may increase.
  • Sleep: If the baby is sleeping, their heart rate may decrease.
  • Gestational age: As mentioned earlier, the baby’s heart rate slows down as the pregnancy progresses.

When Can You Hear A Baby’s Heartbeat?

Ultrasound machine

The first time a baby’s heartbeat can be heard is usually around 8-10 weeks into the pregnancy. This is done using an ultrasound machine or a fetal doppler. The heartbeat may be faint at this stage, but it will become stronger as the pregnancy progresses.

After the first trimester, the baby’s heartbeat will be monitored at each prenatal appointment. This is done to ensure that the baby is growing properly and that there are no issues with the pregnancy.


Hearing your baby’s heartbeat for the first time is a magical moment for any parent. The sound of the fast-paced thumping can bring tears to your eyes and fill your heart with joy. Understanding what a baby’s heartbeat sounds like and how it develops can help you feel more connected to your baby during pregnancy.

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