[3][4] In the mid-1990s he was accused of transferring ova harvested from women into other patients without proper consent at the University of California, Irvine's fertility clinic.
In 1975 he moved to the United States and worked with Robert Benjamin Greenblatt at the Medical College of Georgia before his reproductive endocrinology fellowship at the University of Texas Health Science Center at San Antonio.
Asch was named Assistant Dean of outreach at UCI, in charge of overseeing recruitment of minority students, the same year.
[20] Asch and colleagues Jose Balmaceda and Sergio Stone were indicted on charges of mail fraud and income tax evasion.
[25] On December 30, 2010, the Mexican Attorney's General Office (PGR) announced on its website that it had initiated proceedings to have Asch extradited to the United States.
[28] Asch worked with reproductive technology and pioneered gamete intrafallopian transfer (GIFT),[4] a technique in which eggs are removed from a woman's ovaries, and placed in one of the Fallopian tubes, along with the man's sperm.
[2] Asch worked with Andrew Schally understanding the effects of the Gonadotropin-releasing hormone (GnRH) in infertility and contraception in primates.
[31] Asch, who owned an entertainment company at the time of the scandal, was one of the producers of the Andre Agassi and Nick Bollettieri instructional tennis video Attack.