<Page> EXHIBIT 21.1 LIST OF SUBSIDIARIES AS OF MARCH 15, 2004 <Table> <Caption> STATE OR JURISDICTION OF % OF NAME OF SUBSIDIARY INCORPORATION OWNERSHIP - ------------------------------------------------------------------------------------------------- Applied Biotech, Inc. California 100% Cambridge Diagnostics Ireland Limited Ireland 100% Forefront Diagnostics, Inc. California 100% Hall Laboratories, Ltd. Yukon 100% Innovations Research, LLC Delaware 100% Inverness Medical (UK) Holdings, Ltd. United Kingdom 100% Inverness Medical Benelux BVBA(1) Belgium 100% Inverness Medical Canada, Inc. Canada 100% Inverness Medical International Holding Corp. I Delaware 100% Inverness Medical International Holding Corp. II Delaware 100% Inverness Medical Switzerland GmbH Switzerland 100% Inverness Medical, Inc. Delaware 100% IVC Industries, Inc.(2) Delaware 100% Morpheus Acquisition Corp. Delaware 100% Morpheus Acquisition LLC Delaware 100% Orgenics International Holdings BV Netherlands 100% Orgenics Ltd.(3) Israel 100% Ostex International, Inc. Washington 100% Pregymed GmbH Germany 100% Scandanvian Micro Biodevices ApS Denmark 100% Selfcare Technology, Inc. Delaware 100% Unipath Diagnostics GmbH Germany 100% Unipath Diagnostics, Inc. Delaware 100% Unipath Limited United Kingdom 100% Unipath Management Limited United Kingdom 100% Unipath Online, Inc. Massachusetts 100% Unipath Scandinavia AB Sweden 100% Wampole Laboratories, LLC Delaware 100% </Table> - ---------- (1) Formerly known as Bvba Selfcare Benelux sprl. (2) Doing business as Inverness Medical Nutritionals and Inverness Medical Nutritionals Group. (3) Orgenics, Ltd. has eleven (11) wholly owned subsidiaries, and one majority controlled joint venture, operating outside of the United States.