Your Baby's Anomaly Scan Found a Problem - Planning Delivery and Care Before Birth

The anomaly scan, usually done at 18–22 weeks, checks your baby's organs one by one. When it shows something unexpected, the report may say "structural anomaly", "congenital anomaly" or name a specific finding. Hearing this is frightening, and it is natural to fear the worst.

Many conditions found on this scan affect a single organ system and can be treated with surgery after birth. These include:

• A food pipe that has not formed completely (esophageal atresia)
• A blocked bowel (duodenal or intestinal atresia)
• A gap in the tummy wall (gastroschisis or exomphalos)
• A hole in the diaphragm (congenital diaphragmatic hernia)
• Lung cysts
• Kidney and bladder problems

You won't notice these conditions yourself during pregnancy. They are picked up on ultrasound, most often on the anomaly scan at 18–22 weeks. Some become visible only on a later growth scan.

Sometimes the first clue is indirect. Too much fluid around the baby (polyhydramnios) may show that the baby cannot swallow normally, as in a food-pipe or bowel blockage. Too little fluid may point to a kidney or bladder problem.

The first scan report is often only the beginning. A detailed review by a fetal medicine specialist confirms what the finding is, checks for any other associated problems, and helps estimate how the baby is likely to do after birth.

Before your baby is born. Once the finding is confirmed, a consultation with a paediatric surgeon, ideally together with the neonatologist, helps you understand what the condition means, how it is treated, when surgery will be needed, and what the first days and weeks will look like.

This conversation also covers the practical questions: which hospital to deliver in, what to arrange in advance, and how long you may need to stay.

Depending on the finding, your doctors may suggest:

• A detailed fetal medicine scan to confirm the finding and look for any associated problems.
• Fetal echocardiography to check the baby's heart, because some conditions come with heart differences.
• Fetal MRI, sometimes, for a clearer picture of the lungs, abdomen or brain.
• Genetic tests (amniocentesis or CVS) when a condition is linked with chromosomal differences. For example, a blockage just beyond the stomach (duodenal atresia) is sometimes associated with Down syndrome.
• Repeat scans to follow the baby's growth, the fluid level and the condition itself.

Not every baby needs every test. The aim is to understand your baby's condition well enough to plan the delivery and the first days after birth.

Where to deliver matters most. Babies who need surgery soon after birth should ideally be born in a hospital that has a level III NICU, a paediatric surgeon, paediatric anaesthesia, and a blood bank under one roof. Travelling there while you are still pregnant is far safer than transferring a sick newborn.

Most babies do not need an early delivery or a caesarean. For most of these conditions, the timing and mode of delivery follow your obstetrician's usual advice. A caesarean is advised only in specific situations, such as a very large tumour or sac.

The timing of surgery depends on the condition:

• Within hours: gastroschisis, where the bowel is covered and protected immediately after birth, then placed back inside or supported in a protective bag (silo).
• Within the first days: esophageal atresia and bowel blockages, once the baby has been assessed and stabilised.
• After stabilisation: congenital diaphragmatic hernia. The baby's breathing and circulation are stabilised in the NICU first, and surgery follows when the baby is ready.
• Planned, weeks to months later: many lung cysts and some kidney conditions, when the baby is well at birth.

In the first hours, your baby is examined and stabilised in the NICU. Depending on the condition, this may include a fine tube through the nose or mouth to keep the stomach empty, fluids through a drip, breathing support, and tests to confirm the diagnosis.

You remain your baby's parent throughout. Ask the team when you can see, touch and hold your baby. Expressed breast milk is valuable even when your baby cannot feed yet, because it can be stored and used once feeds begin.

After surgery, feeds are started gradually. The hospital stay varies, from about a week for some conditions to several weeks for others. Before discharge, you will be taught how to feed and care for your baby at home, and follow-up visits will be planned.