Pregnancy Test

A pregnancy test attempts to determine whether a woman is pregnant. Markers that indicate pregnancy are found in urine and blood, and pregnancy tests require sampling one of these substances. The first of these markers to be discovered, human chorionic gonadotropin (hCG), was discovered in 1930 to be produced by the trophoblast cells of the fertilised ovum (blastocyst). While hCG is a reliable marker of pregnancy, it cannot be detected until after implantation: this results in false negatives if the test is performed during the very early stages of pregnancy. Obstetric ultrasonography may also be used to detect pregnancy. Obstetric ultrasonography was first practiced in the 1960s; the first home test kit for hCG was invented in 1968 by Margaret (Meg) Crane in New York. She was granted two U.S. patents: 3,579,306 and 215,774. The kits went on the market in the U.S. and Europe in the mid-1970s.

Read more about Pregnancy TestHistory, Modern Tests, Accuracy, Viability

Other articles related to "pregnancy test, pregnancy tests, pregnancy, tests, test":

Camille Saroyan - Former Relationships
... In "The Proof in the Pudding," Cam finds a positive home-pregnancy test in the bathroom that only she, Brennan, and Angela use ... She knows the pregnancy test is not Brennan's because she would not make a life-altering decision so spontaneously ... Angela claims the pregnancy test isn't hers, so Cam assumes it's Michelle's and freaks out ...
Pregnancy Test - Viability
... Pregnancy tests may be used to determine the viability of a pregnancy ... Serial quantitative blood tests may be done, usually 2–3 days apart ... indicate an increased risk of miscarriage or a possible ectopic pregnancy ...
Unipath - History
... and started to manufacture the first in their line of home pregnancy test kits marketed under the Clearblue brand ... The name is related to the fact that the test produced a blue marker line as a positive (pregnant) result and that it is 'clear' and simple to use ... used as birth control or to help achieve pregnancy ...
Aschheim-Zondek Test - In Popular Culture
... Billy Crystal starred in a 1978 movie Rabbit Test in which his character became pregnant. 1956) in which the rabbit used in her first pregnancy test died from jumping off the examination table, thereby shrugging off any responsibility for her ... Hawkeye removed the ovaries from Radar's rabbit "Fluffy" to run the test when Maj ...

Famous quotes containing the words test and/or pregnancy:

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