Hi Adrian,
Thanks for replying.
The result of google:
(1) Full mother 7,500,000
(2) Blood mother 4,860,000
(3) Genetic mother 789,000
(4) Natural mother 4,490,000
(5) Birth mother 5,640,000
(6) Biological mother 674,000
=============================
Full mother is on the top. But I am not sure about the why. Because we call a biological brother as "full brother" or "blood brother", so i think the two might work somewhere. If possible, please explain me why they have so many "supporters" in google.