They did not, however, use donors with the Δ32 deletion.
Some programs use only donors known to the recipient, others only anonymous.
In the last few years, many hospitals have begun using such donors.
The service, which has not used paid donors, gets first pick of all kidneys available for transplant in the nation.
Ms. Baldwin said that because the center uses younger donors, women ages 21 to 33, the success rate is about 50 percent.
Q. How do you use large donors to build a small-donor network?
People use donors because they want to love and raise a healthy child and need help to conceive that child.
So he tells the egg donor that he plans to create embryos anyway, using several donors.
Most clinics in the United States actually discourage couples from using known donors.
It was looking at the outcomes of using older donors.