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A member asked:

How big is the needle used for an amniocentesis?

3 doctors weighed in across 2 answers

See below: Depending on whether it has side ports and/or a catheter, the needle is 8-15 CM long and 20-21g (about 0.8-0.9 mm wide).

Dr Ali agreed

Answered 1/15/2015

6.1k views

Thank
Dr. Brad Douglas answered

Specializes in Obstetrics and Gynecology

Depends: Depends on how far the anesthesiologist needs to go

Answered 10/21/2018

260 views

Thank

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