Exhibit 23.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Amendment No. 1 to Registration Statement on Form S-4 of AMAG Pharmaceuticals, Inc. of our report dated March 1, 2010 relating to the financial statements, which appears in the Allos Therapeutics, Inc. Annual Report on Form 10-K for the year ended December 31, 2010.  We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

Denver, Colorado

September 13, 2011