| BBB | Blood–brain barrier |
| CO | carbon monoxide |
| e-cig | electronic cigarette |
| FB | fetal breathing |
| FBS | fetal breathing system |
| NEPs | nanosized environmental pollutants |
| pFn | parafacial nucleus |
| pre-Bötn | pre-Bötzinger nucleus |
| RN | respiratory network |
| SEM | Scanning Electron Microscopy |
| SIUDS | sudden intrauterine unexplained death |
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.