An adult with capacity can refuse all forms of treatment (including life-sustaining treatment) even where such a refusal may be considered unwise and/or conflict with prevailing medical advice and could lead to his/her death. The case [In the matter of a Ward of Court (withholding medical treatment) (No. 2) [1996] 2 IR 79] established that an adult with capacity has the right to refuse medical treatment to facilitate a natural death.
A number of subsequent court cases have reinforced the rulings from the Ward of Court case, in particular JM v The Board of Management of St Vincent’s Hospital [2002] 1 IR 321 and Fitzpatrick v FK (No.2) [2008] IEHC 104.
However, this situation becomes more complex in the case of pregnancy given that the rights of both parties (i.e. the mother and unborn) need to be considered. As the HSE's Consent Policy remains in draft form it would be inappropriate for me to comment on it at this stage. I expect the policy to be finalised shortly.