Figure 2.
Hypothesized directed acyclic graph (DAG) between preconception exposure to phenols and preterm birth risk.
Abbreviations: body mass index (BMI); assisted reproductive technology (ART).
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.