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Before immunological pregnancy tests were developed in the 1960s, women relied on urine-based pregnancy tests using animals, ranging from mice to frogs. [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 ...
The African clawed frog or platanna, Xenopus laevis, was first widely used in laboratories in pregnancy assays in the first half of the 20th century.When human chorionic gonadotropin, a hormone found in substantial quantities in the urine of pregnant women, is injected into a female X. laevis, it induces them to lay eggs.
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 ...
In general, it's best to wait until you've missed your period, and to take the test first thing in the morning. Learn how timing impacts accuracy from experts. In general, it's best to wait until ...
A later alternative to the rabbit test, known as the "Hogben test", used the African clawed frog, and yielded results without the need to cut the animal open. [6] Modern pregnancy tests continue to operate on the basis of testing for the presence of the hormone hCG in the blood or urine, but they no longer require the use of a live animal.
Xenopus laevis is also notable for its use in the first widely used method of pregnancy testing. In the 1930s, two South African researchers, Hillel Shapiro and Harry Zwarenstein, [ 26 ] students of Lancelot Hogben at the University of Cape Town , discovered that the urine from pregnant women would induce oocyte production in X. laevis within 8 ...
Looks like a certain type of tiny tree frog in Taiwan has figured a pretty unique way to attract potential female suitors. Discovery News reports, according to new research, a specific species of ...
According to the document members of pedophilic organizations use of descriptions such as "boylove", "girllove", and "childlove" to indicate the pedophile's gender preference and have ...
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