FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   HEALTHCARE VENTURES VII LP 2. Date of Event Requiring Statement (Month/Day/Year) 05/17/2011 3. Issuer Name and Ticker or Trading Symbol Radius Health, Inc. [NONE] (Last) (First) (Middle) 44 NASSAU STREET,  4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) PRINCETON, NJ 08542 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 83,113 D (1) Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A-1 Preferred Stock	  (2)	  (3)	Common Stock	196,510	$ (3)	D (1)	Â
Series A-2 Preferred Stock	  (4)	  (3)	Common Stock	982,780	$ (3)	D (1)	Â
Series A-3 Preferred Stock	  (5)	  (3)	Common Stock	636,630	$ (3)	D (1)	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
HEALTHCARE VENTURES VII LP 44 NASSAU STREET PRINCETON, NJ 08542	Â	  X	Â	Â
LAWLOR AUGUSTINE 55 CAMBRIDGE PARKWAY SUITE 301 CAMBRIDGE, MA 02142	Â	  X	Â	Â
LITTLECHILD JOHN W 55 CAMBRIDGE PARKWAY SUITE 301 CAMBRIDGE, MA 02142	Â	  X	Â	Â
Mirabelli Christopher 55 CAMBRIDGE PARKWAY SUITE 301 CAMBRIDGE, MA 02142	Â	  X	Â	Â
WERNER HAROLD R C/O HEALTHCARE VENTURES LLC 44 NASSAU STREET PRINCETON, NJ 08542	Â	  X	Â	Â
HealthCare Partners VII, L.P. 44 NASSAU STREET PRINCETON, NJ 08542	Â	  X	Â	Â
CAVANAUGH JAMES H C/O HEALTHCARE VENTURES LLC 44 NASSAU STREET PRINCETON, NJ 08542	Â	  X	Â	Â

Signatures

/s/Jeffrey Steinberg, Administrative Partner for HealthCare Ventures VII, L.P.		05/24/2011
**Signature of Reporting Person		Date
Jeffrey Steinberg, Attorney-in-Fact		05/24/2011
**Signature of Reporting Person		Date
Jeffrey Steinberg, Attorney-in-Fact		05/24/2011
**Signature of Reporting Person		Date
Jeffrey Steinberg, Attorney-in-Fact		05/24/2011
**Signature of Reporting Person		Date
Jeffrey Steinberg, Attorney-in-Fact		05/24/2011
**Signature of Reporting Person		Date
Jeffrey Steinberg, Administrative Partner		05/24/2011
**Signature of Reporting Person		Date
Jeffrey Steinberg, Attorney-in-Fact		05/24/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These securities are owned directly by HealthCare Ventures VII, L.P. ("HCVVII"). These securities are owned indirectly by HealthCare Partners VII, L.P. ("HCPVII"), the General Partner of HCVVII, and each of James Cavanaugh, Harold Werner, John Littlechild, Christopher Mirabelli and Augustine Lawlor, the general partners of HCPVII. Drs. Cavanaugh and Mirabelli and Messrs. Werner, Littlechild and Lawlor disclaim beneficial ownership of those securities in which they do not have a pecuniary interest and this report shall not be deemed an admission that they are the beneficial owners of these securities for purposes of Section 16.
(2)	19,651 shares of Series A-1 Preferred Stock which are convertible at any time, in whole or in part at the election of the holder, into 196,510 shares of Common Stock of the Issuer.
(3)	Not Applicable.
(4)	98,278 shares of Series A-2 Preferred Stock which are convertible at any time, in whole or in part at the election of the holder, into 982,780 shares of Common Stock of the Issuer.
(5)	63,663 shares of Series A-3 Preferred Stock which are convertible at any time, in whole or in part at the election of the holder, into 636,630 shares of Common Stock of the Issuer.

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