Health care professionals practice in an environment that is complex, with many regulations, laws, and standards of practice. Performing an abortion is legal but may not be considered ethical by other health care professionals or members of the public at large. Other ethical dilemmas arise at the end of life, when a decision must be made to turn off life-support machines and allow death to occur. Other common ethical issues a health care professional might face are confidentiality, relationships with patients and matters related to consent, especially in the treatment of minors.