"Patients were always safe, that I can tell you," Balin said.
American Society for Reproductive Medicine spokesman Sean Tipton said it's very important to screen egg donors. Tipton also said his group's standards match the FDA's standards.
The president of an affiliated group said the risk of spreading disease through fertility treatment is very low.
"There's never been a reported case of any kind of disease transmission from egg donation," said David Ball, president of the Society for Assisted Reproductive Technology and lab director of Seattle Reproductive Medicine. Screening is "a federal mandate so we have to follow it."
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