Others skip disclosure or say, "You will receive no reimbursement for donating tissue."

Second, scientists later failed to appreciate how the woman's children would react to requests to donate tissue.

If a family agrees to donate tissue, technicians trained by the tissue bank remove tissue at the funeral home.

A 1986 state law requires hospitals to ask families about donating organs and tissue for transplant after a patient dies.

Canavan families around the world donated tissue and money to help this cause.

And any psychological incentive can be removed by separating the decision to abort from that to donate fetal tissue.

Indeed, even parents are legally free not to donate life-saving tissue to their children.

Currently, 20 percent refuse to donate tissue for transplants for privately financed research at Yale University, doctors say.

Celia, the last ibex, died a year after donating tissue from her ear.