Wenche Behring Breivik (1947-2013) was a Norwegian nurse born in Oslo, best known as the mother of Anders Behring Breivik, the perpetrator of the 2011 Norway attacks. She worked in the healthcare sector and raised her son primarily as a single mother following her divorce from diplomat Jens Breivik in 1980, when Anders was one year old. Their family life was marked by significant challenges, including multiple interventions by child welfare services due to concerns over her parenting, mental health issues, and allegations of emotional neglect or abuse toward Anders during his childhood. Wenche struggled with her own health problems, including alcoholism and possible psychiatric conditions, which were documented in welfare reports and later in court testimonies related to her son's trial. Throughout Anders's upbringing, she maintained a close but tumultuous relationship with him, living together in Oslo until he moved out at age 16. She was described in various accounts as overprotective and emotionally dependent on her son, with reports of her experiencing severe anxiety and depression. Wenche passed away on 22 March 2013 at the age of 65, shortly after her son's high-profile trial, succumbing to cancer. Her life and parenting style have been scrutinized in biographical works and media analyses of Anders Breivik's background, highlighting factors that may have influenced his development, though no direct causal links to his actions have been established. Allegations of Munchausen syndrome by proxy and other psychological issues surfaced in retrospective investigations but remain unproven and based on welfare records from the 1980s.