9.3. Analysis.
Comparison 9: 20 ug ethinyl estradiol and 1 mg norethindrone acetate, 28‐day versus 168‐day cycle for 6 months, Outcome 3: Mean of moderate/heavy bleeding days in 168‐day study period
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.