What causes fetal growth restriction?

Placental problems are a central cause, but maternal high blood pressure, some infections, certain fetal or genetic conditions, smoking and significant maternal illness can also contribute. Sometimes no single cause is found.

Fetal growth restriction means the baby is not growing as expected because of a limiting process. It is different from a baby who is small but healthy because of family build. A measurement of the abdomen from outside cannot settle that distinction.

Ultrasound measurements are considered together over time. The team may also assess amniotic fluid and blood flow in the umbilical cord or other vessels. These findings help show whether the placenta is supporting the baby and whether closer surveillance or birth planning is needed.

Attend every recommended growth scan and monitoring appointment, because trends are more informative than one measurement. Your team may check your blood pressure, urine and medical history, and may arrange fetal heart monitoring or additional blood-flow assessment.

There is no home remedy that makes a poorly functioning placenta work normally. Avoid smoking and recreational drugs, take prescribed medicines as directed, eat normally unless given a specific plan, and learn your baby's usual movement pattern. Timing of birth balances continued growth against signs that remaining in the womb is becoming less safe.

Call your maternity unit immediately if your baby moves less than usual or the movement pattern changes; do not wait for the next day or rely on a home listening device. Urgent assessment is also needed for vaginal bleeding, leaking fluid, regular painful tightenings, severe headache, vision changes, sudden swelling, upper abdominal pain or feeling acutely unwell.

Ask which measurements suggest restricted growth, how blood flow and amniotic fluid look, how often monitoring is planned, and what findings would change the timing or method of birth. Clarify where to call at any hour if movements change or another warning symptom appears.