Welcome to Allied Associates OB & GYN

The board certified physicians at Allied Associates Obstetrics & Gynecology in Creve Coeur and O’Fallon are committed to caring for you.

Drs. Craig Boyd, Michael DeRosa, Joseph Herrmann, and Sarah Shores offer you compassionate and quality medicine, using state-of-the-art equipment and cutting edge technology.  With their highly skilled staff of nurse practitioners, registered nurses, ultrasound sonographers & medical assistants, they are here for your well-being and unique needs.

Health Library

View our comprehensive online library of health care topics.
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Well-Woman Visit

Learn more about our annual well-woman visits.
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In Vitro Fertilization

Are you having difficulty getting pregnant? Learn more about our IVF services?
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What's New

View Dr. Michael DeRosa's recent interview on the Today Show