Amniocentesis

Amniocentesis

Amniocentesis is a diagnostic test usually offered after 15 weeks of pregnancy. It detects the same types of conditions as CVS, including:

  • Chromosomal conditions (e.g. Down syndrome)
  • Genetic disorders

Amniocentesis may be recommended if:

  • Your earlier screening (e.g. NIPT or ultrasound) shows a possible issue
  • You are at increased risk of a genetic condition
  • You want a definitive diagnosis later in pregnancy

Table of Contents

  • What happens during an amniocentesis?
  • Is the amniocentesis safe?
  • How long do amniocentesis results take?
  • What is the cost of amniocentesis?

What happens during an amniocentesis?

The procedure involves inserting a fine needle through the abdomen to collect a small amount of amniotic fluid, which contains fetal cells. Like CVS, it is done under continuous ultrasound guidance and usually takes a few minutes.

Amniocentesis is carried out by our specialist fetal medicine doctors with vast experience in the procedure.

Is the amniocentesis safe?

Amniocentesis is considered a low-risk procedure when performed by experienced specialists. There is a small risk of miscarriage (less than 1 in 200), and we take every precaution to ensure the safety of you and your baby.

How long do amniocentesis results take?

There are two types of results:

  • Rapid test (QF-PCR) – available in 2–3 working days. This looks for the most common chromosomal conditions (trisomy 21, 18, and 13).
  • Full karyotype or microarray – available in 10–14 working days. This provides a detailed analysis of all chromosomes and can detect rarer conditions or deletions/duplications.

We will talk you through which type of analysis is most appropriate for your circumstances.

What is the cost of amniocentesis?

Please refer to our Fees & Services page for current pricing, or contact our team directly for more information.