6-7 weeks of pregnancyĪt around 6 or 7 weeks of pregnancy, these two tubes will twist and turn around each other. This is sometimes the first sign of a viable pregnancy. On an ultrasound, the fetal pole is seen as thickening in the margin of the yolk sac (where your teeny tiny baby is). If you go for an early ultrasound, you may hear this referred to as the “fetal pole”. These two tubes will eventually fuse together to become your baby’s heart. 5 weeks of pregnancyīy around 5 weeks of pregnancy, two small tubes will be formed. Subscribe to our blog today.There are many scientific and biological terms that we could get into, but we will try and keep things simple. While it can be scary to think about your baby having a heart rhythm issue, the vast majority of fetal arrhythmias do not indicate serious long-term concerns. Chances are, if we listened more frequently during a woman’s pregnancy, we’d detect arrhythmias in more than the 1 to 2 percent we expect today. In less than 1 percent of infants, a fetal ectopic rhythm can trigger an abnormally high fetal heart rate, which puts the baby at risk for more serious cardiovascular issues.įetal heart arrhythmias are likely more common than we think. Once we determine the cause of the fetal arrhythmia, we will listen to your baby’s heart rhythm using a Doppler weekly until we’re confident the arrhythmia has resolved or will not affect the baby’s health.
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