At a glance
Newborn screening is a set of simple tests performed on a baby within the first few days of life to check for serious but treatable conditions that show no obvious signs at birth.
A few drops of blood are taken from the baby's heel, dried on a special card, and sent to a laboratory. The lab tests the sample for a range of inherited or metabolic disorders, conditions where the body cannot process certain substances properly. Finding these conditions early, before symptoms appear, gives doctors the chance to start treatment when it is most effective.
Medical Condition
Newborn screening is offered to all babies, not because something is known to be wrong, but because many serious conditions are invisible at birth and can only be found through testing. The specific conditions screened vary by country, but most programmes cover the following groups.
- Metabolic disorders: such as PKU (phenylketonuria, where the body cannot break down a protein building-block called phenylalanine), MSUD (maple syrup urine disease), and fatty-acid oxidation defects where the body cannot use fat for energy properly.
- Endocrine disorders: congenital hypothyroidism (an underactive thyroid gland present from birth), and congenital adrenal hyperplasia (a hormone imbalance affecting the adrenal glands above the kidneys).
- Haemoglobin disorders: sickle-cell disease and other conditions that affect the shape or number of red blood cells.
- Hearing loss: a quick hearing test, usually done with a small earphone probe, checks whether the baby responds normally to sound.
- Critical congenital heart disease (CCHD): pulse oximetry (a clip on the baby's hand or foot that measures oxygen in the blood) can detect heart defects that need early surgery.
- Immune deficiency: SCID (severe combined immunodeficiency), a condition where the immune system is almost entirely absent.
Because this is a universal preventive test for all newborns, there are very few situations where it would not be performed. A premature baby may need some tests repeated once they reach a corrected age, and a baby who has already received a blood transfusion before the heel-prick may need specific tests retimed. Your doctor will advise based on your baby's individual situation.
Risks & Complications
Newborn screening is one of the safest medical tests available, and the physical risks to the baby are minimal.
- Brief pain or discomfort: the heel-prick causes a moment of pain. Most babies cry briefly and settle quickly.
- A small bruise or mark at the heel-prick site, which fades within a day or two.
- False-positive results: the screening test may flag a condition that, on further testing, turns out not to be present. This can cause anxiety for parents before the second test confirms everything is normal.
- False-negative results: rarely, a condition present in the baby is not detected by the initial screen. This is why some tests are repeated, and why follow-up with a doctor remains important if symptoms appear later.
- For the hearing test, no physical risk exists. The probe rests gently in the outer ear canal and does not touch the eardrum.
Preparation & Procedure
Newborn screening requires almost no preparation from parents or baby. There is no fasting, no need to pause any medication, and no special diet beforehand. The timing of the test matters more than anything else.
The blood spot test is usually collected between 24 and 72 hours after birth. Testing too early, before the baby has fed, can make some results unreliable. In most hospitals, a midwife or nurse will schedule the heel-prick before the baby goes home. If the baby is born at home or discharged very early, a community midwife or clinic visit will arrange it.
Parents are typically asked to hold their baby skin-to-skin or feed them just before and during the heel-prick, as this reduces the baby's discomfort. No other specific preparation is required of the parent.
The procedure itself follows a straightforward sequence in most hospitals.
- The baby's heel is warmed gently, usually with a warm cloth, to increase blood flow.
- A small lancet (a tiny sharp device) makes a quick, shallow prick on the side of the heel.
- Blood drops are collected and applied to the circles on a special filter-paper card, called a Guthrie card.
- Light pressure is applied to the heel to stop the bleeding. No stitches or bandaging are needed.
- The card is labelled with the baby's details and sent to the laboratory, usually within 24 hours.
- The hearing test is done separately: a small probe is placed gently in the outer ear and sends soft sounds in. The machine measures whether the inner ear responds.
- The pulse oximetry check (where performed) uses a small sensor clipped to the baby's hand and foot for a few minutes while the baby is calm and awake.
Aftercare
Because newborn screening is a non-invasive or minimally invasive test, recovery is essentially immediate and there are no restrictions on feeding, activity, or holding the baby afterward.
- The heel-prick site can be covered with a small plaster if needed and observed for a few minutes. Bleeding nearly always stops on its own.
- Normal feeding can continue straight away, and there is no need to alter the baby's routine.
- Results for the blood-spot panel usually return within one to two weeks. Parents who do not receive a result within that window are advised to contact the midwife or clinic, rather than assume no news is good news.
- A normal result does not require any follow-up for the screening itself, though the baby's scheduled developmental checks continue as usual.
- If a result comes back out of range, the family is contacted promptly and referred to a specialist. This does not always mean the baby has the condition. A repeat test or a different diagnostic test is usually the next step.
- For the hearing test, a refer result (meaning the test did not get a clear response) leads to a follow-up hearing assessment, usually within a few weeks. This is common in newborns and often resolves without any treatment.
- Keep a record of which screening tests were done, the date, and the results. This information may be relevant when the child travels or receives care in another country.
Cost & What Determines It
The cost of newborn screening varies considerably depending on where it is performed, how many conditions are included in the panel, and whether it is part of a public health programme or arranged privately.
- Panel size and scope: a basic screen covering a handful of conditions costs less than an expanded panel that tests for dozens of metabolic and genetic disorders.
- Hospital class and country: a public or government hospital in one country may offer screening at very low or no cost as a national programme, while a private hospital or a country without a public programme charges separately.
- Laboratory technology: some expanded panels use advanced techniques such as tandem mass spectrometry (a machine that identifies many substances at once), which increases the laboratory fee.
- Additional hearing or cardiac screening: pulse oximetry and newborn hearing tests may be bundled with the blood-spot test or billed separately depending on the hospital.
- Repeat testing: if an initial result is uncertain and a second sample is needed, an additional fee may apply.
- Specialist follow-up: if a result is out of range, referral to a metabolic specialist or paediatric cardiologist (a children's heart doctor) will carry its own consultation and diagnostic costs.
- Length of stay: if the baby remains in hospital for other reasons, the screening is usually performed as part of the inpatient stay rather than billed as a separate episode.
When newborn screening is part of a hospital birth package, the basic heel-prick blood-spot test is often included in the delivery or postnatal ward fee. The hearing test and pulse oximetry check may be listed separately. An expanded genetic panel, if the parent requests one beyond what the hospital routinely offers, is almost always billed as an add-on.
Indonesian patients need to be aware that BPJS Kesehatan and most Indonesian private insurance policies do not cover medical procedures performed abroad, including newborn screening done outside Indonesia. Families who give birth or arrange screening overseas will generally pay out of pocket or through a private international insurance plan that explicitly covers newborn care. Before travelling or choosing a facility, asking for a written cost estimate that lists each component of the screening, including what happens if a result requires follow-up, is the most reliable way to avoid unexpected bills.
Frequently Asked Questions
Does newborn screening hurt my baby?
Newborn screening involves a small heel prick to collect a few drops of blood, which causes brief discomfort rather than real pain. Most babies cry for only a moment and settle quickly once the sample is taken. Some screens also include a painless hearing test where soft sounds are played into the ears, and a simple sensor placed on the skin to check oxygen levels.
How long does newborn screening take?
The blood spot collection itself takes just a few minutes, so the whole process is usually done before you and your baby leave the delivery ward. If a hearing test and an oxygen check are done at the same time, the full session still rarely takes more than 30 minutes. Your baby does not need to be in any special state, such as fasting, beforehand.
When will we get the results of newborn screening?
Most results come back within one to two weeks, though the exact timing depends on the laboratory processing the samples. If a result needs a closer look, the hospital or clinic will contact you directly, usually by phone. A normal result is often reported quietly through your child's health record rather than with a separate call.
How much does newborn screening cost?
The cost depends on how many conditions are included in the panel being tested, the class of hospital or clinic, and whether the screen is part of a post-birth package or arranged separately. A panel that checks for more conditions naturally involves more laboratory work, which affects the final figure. Asking the hospital for a written estimate before the birth is the clearest way to know what to expect.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.
