What is non-invasive prenatal testing?
Non-invasive prenatal testing (NIPT) is a blood test done on a pregnant woman to screen for any genetic issues with her growing fetus. Patricia Geraghty, NP and Sharecare advisory board member, explains what issues a NIPT tests for in this video.
Now, we all learned in the fourth grade that DNA grows in the nucleus in our cells. But cells are constantly dying and being rebuilt.
And when the old cells die, the DNA is sort of free-floating around in the blood system. [MUSIC PLAYING]
Noninvasive Prenatal Testing, or sometimes called NIPT, is a way of screening for genetic issues
with a growing fetus. And noninvasive means we're not really poking any big holes. It's a blood test on the pregnant woman that
can identify if there are changes in chromosome number in the growing baby or the fetus--
specifically, trisomy 21, an extra 21st chromosome; trisomy 18, an extra 18; trisomy 13, an extra 13.
And then we all have what are called sex chromosomes too-- X or Y, with XX being a female.
Sometimes an X is missing. Or sometimes there's an extra X. XY being male. And sometimes there's an extra X there too.
So it can identify changes in the number of chromosomes by looking at cell-free DNA.
In the mom's blood, there's little fragments of DNA. Now, we all learned in the fourth grade that DNA grows in the nucleus in our cells.
But cells are constantly dying and being rebuilt. And when the old cells die, the DNA is sort of free-floating around in the blood system.
Some of the DNA is coming from mom, and some of it is growing-- coming from the growing fetus. And so they can count the representation
of different chromosomes and tell us that there's a different number than we would expect. [AUDIO LOGO]
Browse videos by topic categories