6.14. Analysis.
Comparison 6: 20 ug ethinyl estradiol and 100 ug levonorgestrel, 28‐day versus 336‐day cycles for one year, Outcome 14: Mean bleeding days in third trimester
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.