CAMBRIDGE, England--(BUSINESS WIRE)--Grant Instruments, (www.grant.co.uk), a world renowned manufacturer and supplier of custom and own-brand scientific, life sciences and data acquisition products, has introduced the Grant Asymptote EF600 controlled rate freezer designed specifically for use in human and animal In vitro fertilisation (IVF) applications for the cryopreservation of embryos, oocytes, stem cells and spermatozoa.