pre-implantation diagnosis

[prē-ĭm′plăn-tāshən]
n.
  1. A procedure in which embryos generated using in vitro fertilization techniques can be screened for the presence of the gene for a particular characteristic or defect prior to uterine implantation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.