CARLSBAD, Calif.--(BUSINESS WIRE)--Invitrogen Corporation (NASDAQ:IVGN), a provider of essential life science technologies for research, production and diagnostics, today announced the launch of a new kit that allows researchers to quickly and reliably monitor the state of human embryonic stem cells (hESCs). The STEMPRO® EZChek™ Multiplex PCR Kit allows scientists to monitor hESCs with one reaction, using fewer sample cells than ever before.