When does the fetal heartbeat appear?
The fetal heartbeat is one of the first and most important signs of pregnancy. On ultrasound it usually becomes visible at 6–7 weeks, when the size of the fetus (CRL) reaches about 5–7 mm. Transvaginal ultrasound detects the heartbeat earlier than a scan performed through the abdominal wall.
Why might it not be seen?
If the heartbeat is not visible before 6 weeks, this often means that the term is earlier than thought (for example, ovulation occurred later). In such cases radiologist Lana Ezieshvili usually recommends repeating the scan in 7–10 days before drawing any conclusions.
What does the doctor assess at this stage?
- confirmation of an intrauterine pregnancy;
- the number of fetuses;
- the presence and rate of the heartbeat;
- the exact term of the pregnancy.
Do not rush to conclusions
Not detecting a heartbeat at an early stage does not always mean a problem — often it is simply a matter of an early term. For an accurate assessment, an experienced specialist and, if necessary, a repeat scan are important.
Conclusion
The fetal heartbeat usually appears at 6–7 weeks. If you have questions or would like an early assessment, book a visit with radiologist Lana Ezieshvili.
This information is for educational purposes and does not replace a doctor’s consultation.