Ad
related to: using frogs for pregnancy testwalmart.com has been visited by 1M+ users in the past month
3579 S High St, Columbus, OH · Directions · (614) 409-0683
Search results
Results from the WOW.Com Content Network
The frog test had been a highly dependable pregnancy testing method since the 1930s until the immunological test was presented in the 1960s. [12] Pharmacists would inject the female's early urine sample into the frogs and confirm their pregnancy with the spawning of eggs within 18 hours. However, there was a critical prerequisite for accurately ...
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.
If eggs were in the water a day later it meant the woman was pregnant. Four years after the first Xenopus test, Zwarenstein's colleague, Dr Louis Bosman, reported that the test was accurate in more than 99% of cases. [16] From the 1930s to the 1950s, thousands of frogs were exported across the world for use in these pregnancy tests. [17]
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.
This test, known as the frog test, was used throughout the world from the 1930s to 1960s, with Xenopus frogs being exported in great numbers. [38] [39] Shapiro's advisor, Lancelot Hogben, claimed to have developed the pregnancy test himself, but this was refuted by both Shapiro and Zwarenstein in a letter to the British Medical Journal.
Need help? Call us! 800-290-4726 Login / Join. Mail
The proper way to use a stress ball is to throw it at the last person to upset you. Dark Humor Jokes I have many jokes about unemployed people — sadly none of them work.
Ad
related to: using frogs for pregnancy testwalmart.com has been visited by 1M+ users in the past month
3579 S High St, Columbus, OH · Directions · (614) 409-0683