Amag Pharmaceuticals (AMAG) 8-K/A Completion of Acquisition or Disposition of Assets

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

AMAG Pharmaceuticals, Inc.

Waltham, Massachusetts

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (File No. 333-192132) and Form S-8 (File Nos. 333-82292, 333-131656, 333-148682, 333-159938, 333-168786, 333-182821, 333-190435 and 333-197873) of AMAG Pharmaceuticals, Inc. of our reports dated June 14, 2012, relating to the consolidated financial statements and the effectiveness of Lumara Health Inc.’s (formerly K-V Pharmaceutical Company) internal control over financial reporting, which are incorporated by reference in this Form 8-K/A Amendment No. 2. Our report on the consolidated financial statements dated June 14, 2012 contains an explanatory paragraph regarding the Company’s ability to continue as a going concern.

/s/ BDO USA, LLP

Chicago, Illinois

February 24, 2015