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The two primary methods are testing for the female pregnancy hormone (human chorionic gonadotropin (hCG)) in blood or urine using a pregnancy test kit, and scanning with ultrasonography. [1] Testing blood for hCG results in the earliest detection of pregnancy. [2] Almost all pregnant women will have a positive urine pregnancy test one week ...
Clearblue home pregnancy test system 1985. Clearblue was introduced in 1985 with the launch of the first Clearblue Home Pregnancy Test system, which at the time was owned by Unilever. [4] It was the world’s first “rapid home test” that gave pregnancy test results in 30 minutes and allowed a woman to take a test before going to the doctor. [4]
A NASA illustration of a lateral flow assay. A lateral flow test (LFT), [1] is an assay also known as a lateral flow immunochromatographic test (ICT), or rapid test.It is a simple device intended to detect the presence of a target substance in a liquid sample without the need for specialized and costly equipment.
Throughout history, there have been different animal-based tests with the aim of indicating the pregnancy status of women. [4] The most well known test is the Hogben test, prevalent from the 1940s to the 1960s, by using the underlying principle of hormones and its subsequent biological response in both sexes of certain frog species. [5] [6] The ...
Margaret Crane's patent illustration for "Diagnostic Test Device", the first home pregnancy test. Margaret M. Crane (Meg Crane) is an American inventor and graphic designer who created the first at home pregnancy test in 1967 while working at Organon Pharmaceuticals in West Orange, New Jersey. [1]
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The quad test would also tell 5% (~200) of the 3990 normal women that they are high-risk. Therefore, about 208 women would be told they are high-risk, but when they undergo an invasive test, only 8 (or 4% of the high risk pool) will be confirmed as positive and 200 (96%) will be told that their pregnancies are normal.
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