The chief constituent of Uva Ursi is a glycoside called arbutin, but jhave found no effect it would have on the Pill. Its used to cause the uterus to contract after childbirth, and is contraindicated during pregnancy and becuase of its effect ont he smooth muscles ( IE bladder, spleen, etc) So I dont think it would promote pregnancy.....However.. better safe than sorry
mmparks
Posted: 28 Sep 20:24