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.
Airflow and fraction of nitric oxide (NO) in the exhaled breath measures over the menstrual cycle in women with asthma and healthy women. Airflow changes significantly in healthy women and women with asthma over the menstrual cycle. Closed circles represent women with asthma and open circles represent healthy control subjects. Asterisks represent significant changes from Week 1 (all P < 0.05).
