The preservation of life.
D000032:Abortion, Therapeutic; D000328:Adult; D000367:Age Factors; D001291:Attitude of Health Personnel; D004992:Ethics, Medical; D005065:Euthanasia; D005260:Female; D006801:Humans; D008297:Male; D008505:Medical Staff, Hospital; D008511:Medicine; D008875:Middle Aged; D010820:Physicians; D011247:Pregnancy; D006435:Renal Dialysis; D012737:Sex Factors; D012922:Social Change; D013038:Specialization; D013337:Students, Medical; D013727:Terminal Care; D014861:Washington