Samples Used in Prenatal Testing

1. What is amniocentesis?

During amniocentesis, a sample of amniotic fluid (the fluid around the baby) is removed from your uterus. Amniocentesis is performed by inserting a thin needle through your abdomen into your uterus (womb) and withdrawing a small amount of fluid. Your body will make more fluid to replace the fluid that is taken out. The baby will not be hurt during the procedure. Some women feel mild cramping during or after the procedure. Your doctor may tell you to rest on the day of the test, but usually you can resume normal activity
the next day.

What is CVS?

CVS is performed by removing a small sample of the placenta (nourishment for the baby) from the uterus. It is removed with either a catheter (a thin tube) or a needle. Local anesthesia is used for this test. The sample of placenta may be obtained through the cervix. A catheter is inserted into the vagina and through the cervix and the sample is withdrawn. The sample also can be obtained by inserting a needle into the abdomen and withdrawing some of the placenta. Most women feel fine after the test, although some may have mild bleeding (spotting) afterward.

The following is a summary of the samples that can be used to perform the test, the collection method, the shipping requirements and other special requirements. We recommend you contact the laboratory performing the test to confirm the details.

SPECIMENTYPE VOLUME COLLECTION
VESSEL
SHIPPING SPECIAL
REQUIREMENTS
CHORIONICVILLUS 10
MG
SCREW
TOP TUBE
ROOMTEMPERATURE 1
T-25 FLASK
OF CULTUREDCELLS
AMNIOTICFLUID 5
CC
SCREW
TOP
TUBE
ROOMTEMPERATURE 1
T-25 FLASK OF CULTURED
CELLS IF FLUIDIS BLOODY

It is important to note that:

  • Samples need to be shipped out immediately.
  • The sample can be shipped out without ice or refrigeration.

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