Home pregnancy tests utilize ELISA technology. When a woman is pregnant, her body produces a hormone called human chorionic gonadotropin (hCG). Explain how antibodies can be used to detect this hormone and are linked to a color change a woman may see on a positive test.

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aaronq · Answer

ELISA = enzyme-linked immunosorbent assay This is much easier to explain with pictures, watch the "Direct vs. Indirect Detection ELISA Formats" in this link http://www.piercenet.com/method/overview-elisa#detectionformats