Ricardo Hector Asch (born 26 October 1947) is an obstetrician, gynecologist, endocrinologist, and fugitive.
He worked with reproductive technology and pioneered gamete intrafallopian transfer (GIFT).
In the mid-1990s, he was accused of removing ova from women without their consent for use on other patients, as well as associated financial crimes, at the University of California, Irvine's fertility clinic: The Orange County Register's investigations into these practices led to that paper's receiving the 1996 Pulitzer Prize for Investigative Reporting.
Prior to being federally indicted, Asch fled the United States.
Multiple attempts by American officials to extradite him from Latin America have failed.
Asch was last reported as living in Mexico in 2011.