Organization and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2012

Organization and Basis of Presentation [Abstract]

BioTime's ownership of outstanding shares of its subsidiaries

Principles of consolidation – BioTime's consolidated financial statements include the accounts of its subsidiaries. The following table reflects BioTime's ownership of the outstanding shares of its subsidiaries.

Subsidiary	BioTime Ownership	Country
ReCyte Therapeutics, Inc. (formerly Embryome Sciences, Inc.)	95.2%	USA
OncoCyte Corporation	75.3%	USA
OrthoCyte Corporation	100%	USA
ES Cell International Pte., Ltd.	100%	Singapore
BioTime Asia, Limited	81%	Hong Kong
Cell Cure Neurosciences, Ltd.	53.6%(1)	Israel
LifeMap Sciences, Inc.	73.2%	USA
LifeMap Sciences, Ltd.	(2)	Israel
BioTime Acquisition Corporation	96.7%(3)	USA

	(1)	In January 2013 Cell Cure Neurosciences issued additional ordinary shares to BioTime in exchange for BioTime common shares which increased BioTime's ownership, directly and through ESI, to approximately 62.6%. See Note 23.
	(2)	LifeMap Sciences, Ltd. is a wholly-owned subsidiary of LifeMap Sciences, Inc.
	(3)	BioTime expectsthat its percentage ownership will be reduced to approximately 71.6% after BAC issues common stock to BioTime and Geron Corporation pursuant to an Asset Contribution Agreement and sells common stock and warrants to a private investor for cash in a related transaction.

- Definition

The tabular disclosure of the effects of any changes in a parent's ownership interest in a subsidiary on the equity attributable to the parent if the ownership interests in a subsidiary changes during the period. The changes represented by this element did not result in the deconsolidation of the subsidiary.

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