Newborn screening: the heel prick and hearing tests

In your baby’s first days, two small tests happen almost in passing — a few drops of blood from the heel and a painless hearing check — that together screen for dozens of rare but important conditions. Here’s what each involves, and what it does (and doesn’t) mean if you get a call-back.

The heel prick (formally the newborn bloodspot screening) happens between about 48 and 72 hours after birth, usually on the postnatal ward or at home with a visiting midwife. A tiny prick on your baby’s heel, a few drops of blood onto a card, done. It stings for a moment — feeding or cuddling your baby during it genuinely helps, so offer — and that’s the whole procedure.

What it looks for: more than 25 rare conditions, including cystic fibrosis, congenital hypothyroidism, phenylketonuria (PKU) and other metabolic disorders. The connecting thread: all are conditions where a baby can seem perfectly well at birth, but where starting treatment early — before symptoms — makes an enormous difference, sometimes the difference between serious harm and a healthy childhood on a special diet or a daily tablet. That’s why screening is offered to every baby in Australia, and why participation is nearly universal, even though it’s your choice: the conditions are rare, but for the one baby in a thousand-odd who has one, this card of blood spots is life-changing.

The hearing screen usually happens before you leave hospital (or at an early outpatient visit): tiny earphones and sensors while your baby sleeps, measuring the ear’s or brainstem’s automatic responses to soft sounds. Completely painless — most babies snooze through it. A couple of babies in every thousand are born with significant hearing loss, and finding it in the first weeks (rather than when speech is late at age two) means support starts early, in the window when it helps most.

About call-backs — read this before you ever get one. For both tests, a repeat or referral is usually not bad news. Heel-prick recalls are most often about the sample (not enough blood, taken too early) or a borderline result that needs a second look; most repeat tests come back normal. A “refer” on the hearing screen is very commonly fluid still in the ear from birth, or a wriggly baby — many babies pass the follow-up test. The system is deliberately trigger-happy: it would rather recheck many well babies than miss one who needs help. So if the call comes, take the follow-up appointment seriously — and hold your nerve, because the odds remain firmly on your side.

No news is good news for the bloodspot: results generally aren’t sent out when everything is normal, though you can ask your child health nurse how to confirm. The screening card itself is stored securely under state health policies, and you can ask about (or request) its handling if that matters to you.

Both tests will be offered and explained at the time — and any question you have, from “what exactly are you testing for?” to “can I feed her during it?”, is fair to ask the midwife holding the card. If a screening result ever does need follow-up, you’ll be contacted quickly and connected with exactly the right specialists; the whole system is built for that handover. In the meantime: a heel prick, a sleepy hearing check, and one more layer of quiet safety-netting under your brand-new person.