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.
Translocation of opioids across the trophoblast monolayer over time expressed as percentage of dose, showing mean ± standard deviation. The doses were either individual opioids (morphine, heroin, fentanyl, methadone, oxycodone, or naloxone) or mixtures of opioids (morphine + naloxone, heroin + methadone, or heroin + fentanyl). (A color version of this figure is available in the online journal.)
