Does a maternal fetal medicine perform chorionic villus sampling?

Chorionic villus sampling, or CVS, collects a small sample of placental tissue for selected genetic or chromosomal testing. Depending on the placenta's position and the service's approach, the sample may be obtained through the cervix or through the abdomen, with ultrasound guidance. Maternal-fetal medicine specialists assess whether the procedure is suitable, explain what the requested test can and cannot show, and arrange counselling about possible results. The exact timing and route depend on your pregnancy and clinical circumstances.

Take time to discuss the reason for testing, possible outcomes, alternatives, and follow-up. Tell the team about bleeding, clotting conditions, medicines, allergies, and previous pregnancy procedures. Bring relevant reports and ask how the sample will be collected, when results may arrive, and who will discuss them with you. Read more about [Chorionic Villus Sampling](/treatments/pregnancy-and-birth-care/chorionic-villus-sampling/).

After CVS, contact your maternity team promptly if you have heavy bleeding, fluid leakage, fever, increasing pain, contractions, or feel acutely unwell. Seek urgent care for severe symptoms or if you cannot contact the clinic. Before the procedure, report new bleeding, pain, fever, or other pregnancy changes to the service arranging it.

Ask which route is planned, what laboratory test will be used, how uncertain or unexpected results are handled, and whether genetic counselling is available. Confirm activity advice and the contact number for concerns afterward.