Diagnostic Tests
High frequency sound waves used to visualize anatomy throughout a pregnancy
What is ultrasound?
0-13 weeks gestational age
What is the first trimester?
13 weeks gestational age
What is the age by which we see isolated limb movements? (Or all organs are formed)
A needle is used to extract amniotic fluid to examine fetal chromosomes.
What is amniocentesis?
28-42 weeks gestational age
What is the third trimester?
Ultrasound test that looks at the thickness of the skin fold at the back of the neck to screen for Down syndrome and other conditions.
What is the Nuchal Translucency test?
High frequency soundwaves can detect heartbeat by 6 weeks and throughout pregnancy, and in the third trimester can be used to visualize blood flow.
What is Doppler Ultrasound?
13 weeks gestational age
What is the age that all organs are formed? (or isolated limb movements)
Modality that is used for multiple different diagnostic and screening tests that has no known risks to mother or fetus.
What is ultrasound?
Maternal blood draw to check for a specific fetal protein that screens for Down syndrome and other conditions.
What is the Alpha Fetal Protein (AFP) test?
6 weeks gestational age
What is the age that the neural tube closes?
~ 22-23 weeks gestational age; baby may survive with life support
What is the limit of viability?
Sample of fetal tissue to examine chromosomes that can be done by 10.5-13 weeks and has a quoted 0.5% (1/200) risk of miscarriage.
What is chorionic villus sampling?
30 weeks gestational age
What is the age that characteristic grooves in the fetal brain are developing?
~ 32 weeks gestational age; baby may survive without life support
What is the point of viability?