Momenta Pharmaceuticals Announces Date of Earnings Release and Conference Call for...

Momenta Pharmaceuticals Announces Date of Earnings Release and Conference Call
for Third Quarter 2009 Financial Results

CAMBRIDGE, Mass., Oct. 29, 2009 (GLOBE NEWSWIRE) -- Momenta Pharmaceuticals,
Inc. (Nasdaq:MNTA), a biotechnology company specializing in the characterization
and engineering of complex drugs, will report its financial results for the
third quarter ended September 30, 2009 before the U.S. financial markets open on
Thursday, November 5, 2009.

Management will host a conference call on that date at 10:00 am EST to discuss
these results and provide an update on the company. To access the call, please
dial (866) 814-8448 (domestic) or (703) 639-1367 (international) prior to the
scheduled conference call time and provide the access code 3455786. A replay of
the call will be available approximately two hours after the conclusion of the
call and will be accessible through November 19, 2009. To access the replay,
please dial (888) 266-2081 (domestic) or (703) 925-2533 (international) and
provide the access code 3455786.

A live audio webcast of the call will be available on the "Investors" section of
the Company's website, www.momentapharma.com. Please go to the site at least 15
minutes prior to the call in order to register, download, and install any
necessary software. An archived version of the webcast will be posted on the
Momenta website approximately two hours after the call and will be available
through Friday, November 5, 2010.

About Momenta

Momenta Pharmaceuticals is a biotechnology company, headquartered in Cambridge,
MA, specializing in the detailed structural analysis of complex mixture drugs.
Momenta is applying its technology to the development of generic versions of
complex drug products, as well as to the discovery and development of novel
drugs.

To receive additional information about Momenta, please visit the website at
www.momentapharma.com, which does not form a part of this press release. Our
logo, trademarks, and service marks are the property of Momenta Pharmaceuticals,
Inc. All other trade names, trademarks, or service marks are property of their
respective owners.

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CONTACT: Momenta Pharmaceuticals, Inc.
Beverly Holley
617-395-5189