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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0001374170-10-000013.txt : 20100426
<SEC-HEADER>0001374170-10-000013.hdr.sgml : 20100426
<ACCEPTANCE-DATETIME>20100426082256
ACCESSION NUMBER:		0001374170-10-000013
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20100426
DATE AS OF CHANGE:		20100426

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMAG PHARMACEUTICALS INC.
		CENTRAL INDEX KEY:			0000792977
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				042742593
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-38286
		FILM NUMBER:		10768983

	BUSINESS ADDRESS:	
		STREET 1:		100 HAYDEN AVENUE
		CITY:			LEXINGTON
		STATE:			MA
		ZIP:			02140
		BUSINESS PHONE:		6174972070

	MAIL ADDRESS:	
		STREET 1:		100 HAYDEN AVENUE
		CITY:			LEXINGTON
		STATE:			MA
		ZIP:			02140

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ADVANCED MAGNETICS INC
		DATE OF NAME CHANGE:	19920703

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Norges Bank
		CENTRAL INDEX KEY:			0001374170
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			Q8
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		BANKPLASSEN2
		STREET 2:		P.O BOX 1179 SENTRUM
		CITY:			OSLO
		STATE:			Q8
		ZIP:			0107
		BUSINESS PHONE:		004722316922

	MAIL ADDRESS:	
		STREET 1:		BANKPLASSEN2
		STREET 2:		P.O BOX 1179 SENTRUM
		CITY:			OSLO
		STATE:			Q8
		ZIP:			0107
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>efc10-2604_formsc13g.txt
<DESCRIPTION>DISCLOSURE >5%
<TEXT>
                                  UNITED STATES
                         SECURITIES EXCHANGE COMMISSION
                             Washington, D.C. 20549

- -------------------------------------------------------------------------------


                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                                (Amendment No. )*

                            AMAG Pharmaceuticals, Inc.
                  ----------------------------------------------
                                (Name of Issuer)


                          Common Stock, par value USD 0.01 per share
              -----------------------------------------------------
                         (Title of Class of Securities)


                                  00163U106
                              ---------------------
                                 (CUSIP Number)


                                  April 19, 2010
                                ----------------
             (Date of Event which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                              [ ]   Rule 13d-1(b)

                              [X]   Rule 13d-1(c)

                              [ ]   Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


                          Continued on following pages
                                Page 1 of 5 Pages


<PAGE>



                                  SCHEDULE 13G

CUSIP No.: 00163U106                                           Page 2 of 5 Pages
.................................................................................

1.       Names of Reporting Persons.

         I.R.S. Identification Nos. of above persons (entities only).


         NORGES BANK (THE CENTRAL BANK OF NORWAY)
.................................................................................
2.       Check the Appropriate Box if a Member of a Group

         (a) [ ]

         (b) [ ] N/A
.................................................................................

3.       SEC Use Only
.................................................................................

4.       Citizenship or Place of Organization

         NORWAY
.................................................................................

Number of       5.     Sole Voting Power                  1,085,460
Shares
Beneficially    ................................................................
Owned by Each
Reporting       6.     Shared Voting Power                0
Person With     ................................................................

                7.     Sole Dispositive Power             94,210
                ................................................................

                8.     Shared Dispositive Power           991,250
.................................................................................

9.       Aggregate Amount Beneficially Owned by Each Reporting Person

         1,085,460
.................................................................................

10.      Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
         Instructions)

         N/A
.................................................................................

11.      Percent of Class Represented by Amount in Row (9)

         5.17% based on 20,987,794 issued Common Stock
.................................................................................

12.      Type of Reporting Person:

         OO

<PAGE>

CUSIP No.: 00163U106                                    	Page 3 of 5 Pages


Item 1(a).        Name of Issuer:

                  AMAG Pharmaceuticals, Inc. (the "Issuer").

Item 1(b).        Address of Issuer's Principal Executive Offices:
		  100 Hayden Avenue
		  Lexington, MA 02421
		  United States of America

Item 2(a).        Name of Person Filing:

                  This  Statement  is filed on behalf  of each of the  following
		  persons (collectively, the "Reporting Persons"):

                  NORGES BANK (CENTRAL BANK OF NORWAY)

Item 2(b).        Address of Principal Business Office or, if None, Residence:
                  Bankplassen 2
                  PO Box 1179 Sentrum
		  NO 0107 Oslo
		  Norway

Item 2(c).        Citizenship:
                  Norwegian

Item 2(d).        Title of Class of Securities:

                  Common Stock, par value USD 0.01 per share

Item 2(e).        CUSIP Number:

                  00163U106

Item 3.           If This Statement is Filed Pursuant to ss.ss.240.13d-1(b) or
                  240.13d-2(b) or (c),

                  Check Whether the Person Filing is a:

                  This Item 3 is not applicable.

Item 4.           Ownership:

Item 4(a)         Amount Beneficially Owned

                  As of April 19, 2010, Norges Bank may be deemed to be the
		  beneficial owner of 1,085,460 Common shares.

Item 4(b)         Percent of Class:

		  The number of Shares which Norges Bank may be deemed to be the
		  beneficial owner constitutes approximately 5.17% of the total
		  number of Common Stock in issue.


<PAGE>

                                                               Page 4 of 5 Pages


Item 4(c)         Number of Shares of which such person has:

NORGES BANK (CENTRAL BANK OF NORWAY)

(i) Sole power to vote or direct the vote:                    1,085,460

(ii) Shared power to vote or direct the vote:                 0

(iii) Sole power to dispose or direct the disposition of:     94,210

(iv) Shared power to dispose or direct the disposition of:    991,250


Item 5.           Ownership of Five Percent or Less of a Class:

                  This Item 5 is not applicable.


Item 6.           Ownership of More than Five Percent on Behalf of Another
                  Person:

                  This Item 6 is not applicable.

Item 7.           Identification and Classification of the Subsidiary Which
                  Acquired the Security Being Reported on By the Parent Holding
                  Company:

                  This Item 7 is not applicable.

Item 8.           Identification and Classification of Members of the Group:

                  This Item 8 is not applicable.

Item 9.           Notice of Dissolution of Group:

                  This Item 9 is not applicable.

Item 10.          Certification:

                  By signing below each of the Reporting Persons certifies that,
to the best of their knowledge and belief, the securities referred to above were
not  acquired and are not held for the purpose of or with the effect of changing
or influencing the control of the issuer of the securities and were not acquired
and are not  held in  connection  with or as a  participant  in any  transaction
having that purpose or effect.


<PAGE>

                                                               Page 5 of 5 Pages


                                    SIGNATURE

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

                                        NORGES BANK
Date: April 26, 2010
                                        By:       /s/ Jonas Lexmark
                                                  ----------------------
                                        Name:     Jonas Lexmark
                                        Title:    Analyst





</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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