Baby Development Week By Week Heartbeat

Baby Development Week By Week HeartbeatSource:

Week 4-5: Tiny Heart Begins to Beat

Congratulations! You’re pregnant! At week 4-5, your baby is the size of a small seed. Although it’s still too early to see on an ultrasound, your baby’s heart is already beating! The tiny heart is only about the size of a poppy seed, but it’s an exciting milestone in your baby’s development.

Week 6: Heartbeat Visible on Ultrasound

At week 6, the heartbeat is strong enough to be seen on an ultrasound. You may even be able to hear it! The heartbeat should be between 90 and 110 beats per minute, and will continue to increase as your baby grows.

Week 8-9: Fetal Heartbeat Different from Mother’s

By week 8-9, your baby’s heartbeat is starting to become more distinct and recognizable. It’s important to note that your baby’s heartbeat is different from your own. The fetal heartbeat is much faster, averaging around 150-170 beats per minute.

Week 10-11: Heartbeat Can Be Heard with a Doppler

At week 10-11, the heartbeat is strong enough to be heard with a Doppler. Your doctor or midwife will use a handheld Doppler device to listen to your baby’s heartbeat. This can be a very exciting moment for expectant parents!

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Week 20: Heartbeat Regularly Heard at Prenatal Visits

By week 20, the heartbeat is regularly heard at prenatal visits. Your doctor or midwife will use a fetal stethoscope or Doppler to listen to your baby’s heartbeat. The heartbeat should be strong and steady, and will continue to increase in rate until birth.

Week 24: Baby Responds to Changes in Heartbeat

At week 24, your baby is beginning to become more aware of its surroundings. Your baby can now respond to changes in the heartbeat, such as increased heart rate during physical activity or stress.

Week 28: Heartbeat Can Be Monitored with Non-Stress Test

By week 28, your doctor may recommend a non-stress test to monitor your baby’s heartbeat. This test involves placing two sensors on your belly to measure the baby’s heart rate and movements. The test is non-invasive and painless, and can be done in the doctor’s office or at a hospital.


As you can see, the fetal heartbeat is an important aspect of your baby’s development. It’s amazing to think that something as tiny as a poppy seed can have such a strong and distinct heartbeat. Make sure to attend all of your prenatal appointments so that your doctor can monitor your baby’s heartbeat and ensure that everything is on track.

Frequently Asked Questions

1. When does the fetal heartbeat start?
The fetal heartbeat usually starts around week 4-5 of pregnancy.2. How fast should the fetal heartbeat be?
The fetal heartbeat should be between 90 and 170 beats per minute, with an average of around 130-160 beats per minute.3. Can I hear my baby’s heartbeat at home?
It’s not recommended to try to listen to your baby’s heartbeat at home with a fetal Doppler device. Your doctor or midwife can listen to the heartbeat at your prenatal appointments.4. What if my baby’s heartbeat is too fast or too slow?
If your baby’s heartbeat is outside of the normal range, your doctor may recommend further testing or monitoring to ensure that everything is okay.5. Can stress affect my baby’s heartbeat?
Stress can increase your baby’s heart rate, but it’s important to try to manage stress during pregnancy to prevent any negative effects on your baby’s development.

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I am a child development specialist with a strong passion for helping parents navigate the exciting and sometimes challenging journey of raising a child. Through my website, I aim to provide parents with practical advice and reliable information on topics such as infant sleep, feeding, cognitive and physical development, and much more. As a mother of two young children myself, I understand the joys and struggles of parenting and am committed to supporting other parents on their journey.

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