PregnancyTests

PregnancyTests - "The rabbit died!- The pregnancy test...

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"The rabbit died!”- The pregnancy test Shortly after a fertilized egg implants itself in the uterine wall of a woman the body starts producing a hormone known as human chorionic gonadotropin ( hCG ). The presence of hCG causes the placenta to produce progesterone after implantation, necessary to prevent rejection of the developing embryo. The rabbit always died, because the animal had to be killed before its ovaries could be examined. Female rabbits injected with urine containing hCG would, within a few days, display distinct ovarian changes. Still based on measuring the amount of hCG present in urine, but they do so directly, without the need of an animal intermediary to serve as a test subject. Modern pregnancy tests: "sandwich assays" Sandwich assays use two or more animal antibodies raised against different sites on hCG . Protective biological agents (proteins) generated by the body’s immune system in response to infection hCG
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This note was uploaded on 03/16/2011 for the course CHEM 004 taught by Professor Zysmilich during the Spring '06 term at GWU.

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PregnancyTests - "The rabbit died!- The pregnancy test...

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