Many lesbian, gay, bisexual, and transgendered people are parents. In the 2000 U.S. Census, 33% of female same-sex couple households and 22% of male same-sex couple households reported at least 1 child under the age of 18 living in the home. LGBT parenting in general, and adoption by LGBT couples in particular, are issues of major political controversy in many Western countries, often seen as part of a "culture war" between conservatives and social liberals. Common methods of LGBT parenting are adoption, donor insemination, foster parenting, and surrogacy, as well as parenting by a mother or father who was previously in a heterosexual relationship.