I read "I Donated My Kidney to a Stranger and It Was the Best Decision of My Life" She is only 20 years old to make her decision to donate her one kidney to a stranger who is 32 years old mother with 2 kids. 

I do not think live donation is a proper way to donate kidney because donator will be affected the health because of only one kidney working. In the life time for a young donator, her only one kidney may be failure for any reason.

I do not know why the doctor is agree to perform this kind of operation? This kind of live kidney implant will destroy a young donator's health.