BIOMETRICS
What two measurements, when combined, will calculate the head circumference?
BPD and OFD
When twins result from the union of two sperm and two ovum, they are called? (Hint, two words)
Dizygotic and Fraternal
The cavum septum pellucidum (CSP) is located where in relationship to the thalamus?
anterior
What chamber of the heart is closest to the spine?
Left Atrium
Fetal blood transfusion is performed via?
cordocentesis
3-11mm
Dizygotic twins are thought to occur due to an increase in which hormone?
FSH
What is the space located posterior to the cerebellum called?
Cisterna Magna
What ventricular outflow tract leads to the aorta?
LVOT
Amniocentesis is performed for genetic testing between __ - __ weeks.
15-20
When obtaining the BPD/HC, what anatomy should be present in the image and what plane is this image obtained?
Image taken in TRV/Axial, anatomy present should be thalamus, third ventricle, and CSP.
Which type of monozygotic twinning is demonstrated if the division of one fertilized egg occurs by day 3?
Dichorionic-Diamniotic
What is the structure called that appears as a thin white line in the middle of the cerebrum?
Falx Ceribri
What ventricular outflow tract leads into the pulmonary artery?
RVOT
What are the parameters of a Biophysical Profile?
Fetal Breathing for 30 consecutive seconds
Fetal Tone
Fetal Movement
AFI
NST
What is the formula used to determine the mean sac diameter?
(length+width+height)/3
True or False?? Diamniotic/monochorionic pregnancy is suggested by a thin wispy membrane measuring between 4-8mm?
False, it should be <2mm
What ventricle is located within the thalamus?
Third ventricle
What is the opening in the atrial septum called?
Foramen Ovale
Umbilical artery doppler is used in surveillance of?
Fetal Well Being
What anatomy should be present at the level in which the abdominal circumference is taken?
stomach, portal vein, umbilical vein
Monochorionic-Monoamniotic twinning has the highest mortality rate and occurs when the fertilized ovum splits between what days?
Days 8-13
What landmark indicates that the widest portion of the lateral ventricle is being measured, and what should the normal measurement be under?
Choroid Plexus, and 1.0cm (10mm)
This fetal circulation shunt connects the pulmonary artery and aorta?
Ductus Arteriosis
If an umbilical artery doppler is performed and the velocity shows a high resistive waveform with increased RI and PI, what specialty test should be done next?
Middle Cerebral Artery Doppler