Educational clinical resource
Fetal anaemia and intrauterine transfusion assessment
How fetal anaemia is suspected, assessed with Doppler and fetal blood sampling, and treated with intrauterine transfusion in selected pregnancies.
- 01Fetal transfusion
- 02TTTS laser
- 03FETO
- 04Shunts & drainage
How to navigate Fetal anaemia and intrauterine transfusion assessment
An educational path from the first question to the next step. It does not replace individual assessment.
- 01Recognise the finding
Name the maternal, fetal, placental, or pregnancy concern precisely.
- 02Confirm what it means
Check gestation, diagnostic criteria, severity, and possible alternatives.
- 03Stratify risk
Identify what changes maternal safety, fetal wellbeing, timing, or prognosis.
- 04Plan surveillance
Match monitoring intensity to the condition and how quickly it can change.
- 05Escalate when needed
Refer, admit, treat, or plan birth when thresholds are reached.
Visual decision pathway
Fetal anaemia: surveillance to transfusion decision
Risk history, Doppler, fetal condition and gestational age are interpreted together before an invasive decision.
- RiskIdentify an at-risk fetus
Maternal antibodies, parvovirus, fetomaternal haemorrhage or a relevant twin complication.
- ScreenMeasure MCA velocity
Use technically sound gestation-adjusted Doppler with a full fetal and hydrops assessment.
- ConfirmSample only when it changes care
Direct fetal blood measurement may be considered when significant anaemia is suspected.
- TreatTransfuse or deliver
Balance severity, gestation, access, repeat treatment and neonatal capability.
Fetal anaemia means that the fetus has too few circulating red blood cells or insufficient haemoglobin to carry oxygen normally. Severe anaemia can make the fetal heart work harder, lead to heart failure and hydrops, and threaten survival. Timely recognition matters because selected cases can be treated by transfusing compatible blood before birth.
Important causes include maternal red-cell antibodies, parvovirus B19 infection, fetomaternal haemorrhage, complications of monochorionic twins, and less common fetal or placental disorders. The diagnostic pathway depends on the suspected cause; a single ultrasound sign is not enough.
How anaemia is assessed
Middle cerebral artery peak systolic velocity is a non-invasive Doppler measurement used to screen a fetus at risk. Blood travels faster when it is less viscous because of anaemia. The result must be interpreted against gestational age, technical quality, previous transfusions, and the rest of the fetal examination.
Ultrasound also assesses the heart, placenta, amniotic fluid, movement, and signs of hydrops such as fluid around the lungs or heart, abdominal fluid, skin oedema, or placental thickening. Hydrops is a sign of serious disease, but its cause must still be established.
When significant anaemia is suspected and the result will change treatment, fetal blood sampling may be considered. This directly measures fetal blood values but is an invasive procedure with pregnancy-related risks.
Intrauterine transfusion
Intrauterine transfusion delivers prepared donor red cells to the fetal circulation under continuous ultrasound guidance. Planning includes blood selection and preparation, fetal and placental access, maternal testing, anaesthesia or analgesia arrangements, neonatal backup, and the possibility that more than one transfusion will be needed.
The balance between transfusion and delivery depends on gestational age, severity, fetal condition, cause, technical feasibility, and the capability of neonatal care. Even after successful prenatal treatment, the baby may need monitoring and treatment for anaemia or jaundice after birth.
UAE service timing
Fetal transfusion is available now at Mediclinic Airport Road Hospital in Abu Dhabi. Patients with suspected severe anaemia or hydrops should be referred promptly for diagnostic assessment and pathway coordination because the fetus may be deteriorating; transfusion remains subject to specialist confirmation, candidacy, governance, and informed consent.