| PI | Pulsatility index |
| MCA | Middle cerebral artery |
| UA | Uterine artery |
| PHS | Prenatal Hearing Screening |
| GA | Gestational age |
| MCA-PI | PI in the middle cerebral artery |
| PIB | PI baseline value |
| PIR | PI values following auditory stimulation—PI reactions |
| RePI | Relative changes of PI values; RePI = (PIB – PIR)/PIB |
| AbsPI | Absolute changes of PI values; AbsPI = Abs(RePI) |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.