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[1] [2] Advancements in medical technology have enabled women to accurately check their pregnancy status by using 'pee-on-a-stick' pregnancy test kits at home. Before these accessible and convenient test kits were invented, scientists strived to discover a way in spotting pregnancy-related hormones by a natural, simple test, where animals were ...
The rabbit test became a widely used bioassay (animal-based test) to test for pregnancy. The term "rabbit test" was first recorded in 1949, and was the origin of a common euphemism, "the rabbit died", for a positive pregnancy test. [4] The phrase was, in fact, based on a common misconception about the test.
Medical providers often struggle to 'rule out' pregnancy for medical testing or treatment that cannot be conducted during pregnancy before they can do an accurate urine pregnancy test. [ 27 ] More rare, false negative results can also occur due to a " hook effect ", where a sample with a very high level of hCG is tested without dilution ...
A test that says it can detect pregnancy up to six days before a missed period, for example, generally has a lower hCG threshold than one that says it can detect it up to three days before your ...
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The hemoglobin alkaline denaturation test can detect the presence of maternal blood, which is indicated by a color change from red to brown when the sample is added to alkali reagent. [ 13 ] [ 14 ] Blood typing would also detect maternal blood, as the I antigen only occurs in adults. [ 12 ]
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