Hi! I totally understand the worry, especially for your first baby girl, it is so hard not to overthink every finding. From what I have heard, when ARSA shows up as an isolated finding with low-risk NIPT results like yours, most babies go on to be completely fine, feeding well, breathing well, developing normally with no issues related to the artery at all. My friend went through the same thing at her detailed scan, and her gynae referred her for a fetal echo just to rule out any heart concerns, which came back clear, and she said that extra step really helped put her mind at ease. The tricky part is weighing whether to go ahead with the invasive test, the less than 1% miscarriage risk sounds small, but some mums felt it was unnecessary given strong NIPT results, while others wanted the absolute certainty for peace of mind. Honestly, both choices are valid and really depend on how you are coping emotionally with the uncertainty. That said, do have a longer chat with your gynae or ask for a referral to a fetal medicine specialist, since they can look at your full picture and give you the most personalised guidance.
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