Dengys y ffigurau bod 10 allan o’r 31 o bobl a fu farw ac a roddodd eu horganau rhwng 1 Rhagfyr 2015 a 31 Mai 2016 wedi gwneud hynny drwy gydsyniad tybiedig, gan nad oeddent wedi cofrestru penderfyniad i optio i mewn nac optio allan.
Figures show that of the 31 deceased people who donated their organs between 1st December 2015 and 31st May 2016, 10 had their consent deemed because they had not registered a decision to either opt in or opt out of becoming an organ donor.