Abbreviation	Definition
AA	Aortic Arches
ACA	Anterior Cerebral Artery
AChA	Anterior Choroidal Artery
Acom	Anterior Communicating Artery
AICA	Anterior Inferior Cerebellar Artery
AS	Aortic Sac
BA	Basilar Artery
CCA	Common Carotid Artery
CD	Carotid Duct
CoW	Circle of Willis
CRL	Crown–Rump Length
CS	Carnegie Stage
CVA	Carotid–Vertebral Anastomosis
DA	Dorsal Aortae
DiA	Diencephalic Artery
DV	Diencephalic Vesicle/Diencephalon
ECA	External Carotid Artery
HA	Heubner Artery (Distal medial striate artery)
HpA	Hypoglossal Artery
HyA	Hyoid Artery
ICA	Internal Carotid Artery
LNA	Longitudinal Neural Artery
MCA	Middle Cerebral Artery
MeA	Mesencephalic Artery
MtV	Metencephalic Vesicle/Metencephalon
MV	Mesencephalic Vesicle/Mesencephalon
MxA	Maxillary Artery
MyV	Myelencephalic Vesicle/Myelencephalon
OA	Ophthalmic Artery
OlfA	Olfactory Artery
OpticA	Optic Artery
OV	Otic Vesicle
PA	Proatlantal Artery (type 1/type 2)
PCA	Posterior Cerebral Artery
PChA	Posterior Choroidal Artery
Pcom	Posterior Communicating Artery
PDOA	Primitive Dorsal Ophthalmic Artery
PICA	Posterior Inferior Cerebellar Artery
PV	Prosencephalic Vesicle/Prosencephalon
PVOA	Primitive Ventral Ophthalmic Artery
RP	Rathke’s Pouch
RV	Rhombencephalic Vesicle/Rhombencephalon
SC	Spinal Cord
SCA	Superior Cerebellar Artery
SpA	Spinal Artery
StA	Stapedial Artery
TrA	Trigeminal Artery
TV	Telencephalic Vesicle/Telencephalon
VA	Vertebral Artery
VPA	Ventral Pharyngeal Artery
I	Olfactory Nerve
II	Optic Nerve
III	Oculomotor Nerve
IV	Trochlear Nerve
V	Trigeminal Nerve
VI	Abducens Nerve
VII	Facial Nerve
VIII	Vestibulocochlear Nerve
IX	Glossopharyngeal Nerve
X	Vagus Nerve
XI	Accessory Nerve
XII	Hypoglossal Nerve