Continuous or extended cycle vs. cyclic use of combined hormonal contraceptives for contraception.
Cochrane Database Syst Rev. 2014 Jul 29;2014(7):CD004695. doi: 10.1002/14651858.CD004695.pub3.
Cochrane Database Syst Rev. 2014.
PMID: 25072731
Free PMC article.
Review.