A Reproductive Lexicon


Ownership of this website has been transferred from Northwestern University to Michigan State University.
Please note that some site information may be inaccurate while adjustments to reflect this organizational change are made.

MOOC Advertisement

Learn More:
Get An Introduction to Reproduction

Learn more about the science of reproduction. Dr. Teresa Woodruff, creator of Repropedia, is offering a free online course exploring the world of reproduction.

Get Started!

Enzyme-Linked Immunosorbent Assay

Enzyme-Linked Immunosorbent Assay, or ELISA, is a method used to measure reproductive hormones (eg. proteins or steroids) in blood samples. The technique uses antibodies that are linked to an enzyme. The antibodies specifically bind to the hormone in the blood sample. At the end of the reaction, a chemical is added and the enzyme causes a change in color (from clear to blue). The amount of hormone in the sample is directly proportional to the change in color.

Also Known As: