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What does OB stand for?

OB stands for Occult Blood

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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Other Resources:
We have 18 other meanings of OB in our Acronym Attic

Samples in periodicals archive:

The CLIA-waived Hemosure[R] Immunochemical Fecal Occult Blood Test (iFOBT) offers a notable consideration in that there are no drug or diet restrictions.
Fecal occult blood tests (blood in the stool) only pick up 10 to 20 percent of colon cancers in men and women.
I have seen capitated physicians throw positive stools for occult blood in the garbage to avoid the cost of a colonoscopy and missing cancers that could have been diagnosed earlier.