When sex education is contentiously debated, the chief controversial points are whether covering child sexuality is valuable or detrimental; whether LGBT sex education should be integrated into the curriculum; the use of birth control such as condoms and hormonal contraception; and the impact of such use on pregnancy outside marriage, teenage pregnancy, and the transmission of STIs. Increasing support for abstinence-only sex education by conservative groups has been one of the primary causes of this controversy. Countries with conservative attitudes towards sex education (including the UK and the U.S.) have a higher incidence of STIs and teenage pregnancy.