** Genetic testing company GeneDx WGS.O shares slump 41.5% to $68.43 and set for biggest one-day fall on record

** Co posts Q1 rev of $87.1 mln, down 8.6% from last quarter's $95.3 mln

** Reports net loss of $6.5 mln, or 23 cents per share, in Q1

** WGS, however, beats analysts' estimates for Q1 results and forecasts full-year revenue above estimates- LSEG data

** Three out of 6 analysts rate stock as "buy" or higher, 3 "hold"; Median PT is $109.50

** At last close, WGS was trading at over two-year high of $117.75

** Including session's moves, WGS down ~11% YTD

(Reporting by Twesha Dikshit)

((Twesha.Dikshit@thomsonreuters.com))