Outcome of First-Trimester Pregnancies with Slow Embryonic Heart Rate at 6–7 Weeks Gestation and Normal Heart Rate by 8 Weeks at US. This is followed by a decrease in FHR becoming on average:Īlthough in the healthy fetus the heart rate is usually regular, a beat-to-beat variation of approximately 5 to 15 beats per minute can be allowed. The FHR is then usually around 100 to 120 beats per minute (bpm).įHR then increases progressively over the subsequent 2-3 weeks becoming 7: Method A prospective cross-sectional study of 2727 low-risk singleton pregnant women was undertaken. There is nothing to worry about as of now. Sukriti Sabharwal Clinical Microbiologist 9 yrs exp Delhi Consult Now Yes this is normal. Evolution through gestationĪlthough the myocardium begins to contract rhythmically by 3 weeks after conception (from spontaneously depolarizing myocardial pacemaker cells in the embryonic heart) it is first visible on sonography around 6 weeks of gestation. Abstract Introduction The aim of this study was to evaluate and report normal sonographic FHR values among low-risk singleton women across the three trimesters of pregnancy and determine FHR role in gestational age prediction. Answers ( 1) Like the answers Consult privately with the doctor of your choice Dr. It is measurable sonographically from around 6 weeks and the normal range varies during gestation, increasing to around 170 bpm at 10 weeks and decreasing from then to around 130 bpm at term. A fetal heart rate below 70 beats per minute around 6-8 weeks usually predicts a miscarriage. But some people may have a resting heart rate that’s lower than 60 bpm and is still. The lower the fetal heart rate is around 6-8 weeks, the higher the miscarriage rate can be predicted. A normal fetal heart rate (FHR) usually ranges from 120 to 160 beats per minute (bpm) in the in utero period. According to the American Heart Association (AHA), a normal resting heart rate is between 60 and 100 bpm.

Normal heart rate at 6 weeks