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Reassuring signs of viable pregnancy and ultrasound testing

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Hi there, my gestational sac has grown nicely and is measuring 26mm (mean sac diameter). There is a fetal pole present with a heartbeat. Yet the fetal pole has not grown for the past week and is measuring just 3.7mm. I have had no spotting or pains. My HCG level is at a good level and doubling. Heartbeat is present and has been present for the past 2 weeks. According to my own dates i should be 8 weeks. At scan 1 I had just the yolk sac present. At scan 2 fetal pole and heart pulsations were present. At scan 3 fetal pole and heartbeat was present. The scans were spaced at weekly intervals. The sac has grown 11 mm in the past week to a mean sac diameter of 27mm, and heartbeat is present, but fetal pole does not appear to have grown since last week. Is this pregnancy still viable?

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replied May 18th, 2009
Pregnancy Q and A Answer A6593
Your question is, "Is this pregnancy still viable?"

The presence of a fetal pole with a heartbeat and a doubling BHCG level is usually a reassuring sign of a viable pregnancy, especially with an intact gestational sac. However, measuring a fetal pole is not the standard of care in the US. In the United States, we also do not usually perform weekly ultrasound scans of a first trimester pregnancy. However, I suspect that a repeat ultrasound in one month would reveal progressive growth of your baby. I address first trimester anatomy in my book, The Smart Mother's Guide to a Better Pregnancy. Based on your descriptions, it doesn't seem like you have anything to worry about.

You can consult your physician if you remain concerned. Thanks for asking your question and good luck with your pregnancy.
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