DNA test

“The DNA test would take weeks, but Sheriff Lowell thought they might be able to get a preliminary match earlier.”

Tell No One

“At the eight-cell stage, it is possible to remove one of the cells from each embryo and perform a DNA test upon it.”

Simon & Schuster: The Language of God

“A conclusive DNA test will take more time," Krinsky went on.”

Tell No One

“But a DNA test that reveals whether an embryo is destined to have Tay-Sachs disease can also be used to determine whether the embryo is male or female, or whether it carries an adult-onset-disease risk like a mutation in the BRCA1 gene.”

Simon & Schuster: The Language of God