A soft marker found on the 18–22 week anomaly scan, when your NIPT has already come back low-risk, is usually a variation your sonographer is required to note — not a new red flag. Soft markers are minor scan findings, like a bright spot in the baby's heart or a slightly shorter nasal bone, that are seen in a meaningful share of entirely normal pregnancies. A reassuring NIPT result before the scan meaningfully lowers how much weight that marker should carry.

What counts as a "soft marker"

  • Echogenic intracardiac focus (EIF): a small bright spot inside one of the heart's chambers, usually caused by a tiny deposit of calcium in a heart muscle (a papillary muscle) — it doesn't affect how the heart works.
  • Short or absent nasal bone: the nasal bone measures a little smaller than the expected range for gestational age.
  • Echogenic bowel: a segment of bowel appears brighter than usual on the scan.
  • Mild pyelectasis: slight fluid dilation in the kidney's collecting system, usually followed up with a repeat scan later in pregnancy rather than acted on immediately.

Each of these is picked up on a large share of routine anomaly scans and, on its own, is not a diagnosis of anything.

Why a low-risk NIPT changes the picture

NIPT (non-invasive prenatal testing) screens cell-free fetal DNA in your blood for the most common chromosomal conditions, and it's considerably more sensitive for these than a soft marker on ultrasound is. When NIPT has already come back low-risk, a single isolated soft marker on the anomaly scan adds very little additional risk on top of that — which is why many soft markers, seen after a reassuring NIPT, are not treated as a reason for further invasive testing like amniocentesis.

This is different from a soft marker found without prior NIPT, or alongside other markers or structural findings — in those situations, your doctor may recommend genetic counselling or further testing to build a fuller picture.

What your doctor will typically do next

  • Note it and reassure you, if it's an isolated marker with a reassuring NIPT and no other findings on the same scan.
  • Recommend a repeat scan, particularly for mild pyelectasis, to check the finding has resolved later in pregnancy as it often does.
  • Refer for genetic counselling, if there's more than one marker, a structural abnormality alongside it, or if NIPT wasn't done and you'd like a fuller risk picture.

An isolated soft marker with a reassuring NIPT is one of the most common reasons for a worried late-night search after a scan — and, in that exact combination, one of the least concerning findings your doctor will see that day.

Frequently asked

Will the echogenic focus in my baby's heart need treatment?

No. It's a benign finding related to how that part of the heart muscle looks on ultrasound, not a structural heart problem, and it doesn't require any treatment or follow-up cardiac testing on its own.

Does a short nasal bone mean something is wrong with my baby's face?

No — the nasal bone measurement is a screening marker associated with chromosomal conditions in some studies, not a predictor of how your baby's face will actually look. A short measurement with a low-risk NIPT is not something that needs correcting or re-scanning for appearance reasons.

Should I ask for an amniocentesis just to be sure?

That's a personal decision to discuss with your doctor, but a single soft marker after a reassuring NIPT generally doesn't meet the threshold most doctors use to recommend an invasive test, since amniocentesis carries its own small procedural risk.

Will this marker show up again on my growth scans?

Markers like an echogenic focus often become less visible or disappear entirely as the pregnancy progresses; pyelectasis is specifically rechecked for this reason. Your doctor will tell you whether a repeat look is needed for your particular finding.

I have more than one soft marker — does that change anything?

Possibly. More than one marker on the same scan is usually treated differently from an isolated one, and your doctor may suggest a more detailed discussion of your overall risk, even with a reassuring NIPT.