A nurse comes to your house, takes some measurements and fluid samples.

It is important not to cough, breathe deeply, or move when the fluid sample is being taken.

He was trying to take a fluid sample and do a field genetic analysis.

Levels of certain substances in the fluid sample, such as alpha-fetoprotein, can also be checked.

Contamination may also be removed and fluid samples collected.

Once the fluid samples had been obtained, she began to remove the internal organs.

Amniocentesis involves the collection and analysis of an amniotic fluid sample.

Other tests may be performed on the pericardial fluid sample.

When filled, the container was closed, sealing the fluid sample at the formation pressure.