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Thread: pretty cool site on the history of pregnancy tests!

  1. #1

    Default pretty cool site on the history of pregnancy tests!

    http://history.nih.gov/exhibits/thin.../timeline.html

    1350 BCE
    One of the earliest written records of a urine-based pregnancy test can be found in an ancient Egyptian document. A papyrus described a test in which a woman who might be pregnant could urinate on wheat and barley seeds over the course of several days: “If the barley grows, it means a male child. If the wheat grows, it means a female child. If both do not grow, she will not bear at all.” Testing of this theory in 1963 found that 70 percent of the time, the urine of pregnant women did promote growth, while the urine of non-pregnant women and men did not. Scholars have identified this as perhaps the first test to detect a unique substance in the urine of pregnant women, and have speculated that elevated levels of estrogens in pregnant women’s urine may have been the key to its success.

    Middle Ages through the Seventeenth Century
    Using visual aspects of urine to detect pregnancy became a popular method. In Europe, so-called “piss prophets” claimed to be able to diagnose many different conditions and diseases by the color of urine. In a 1552 text, pregnancy urine was described as: “clear pale lemon color leaning toward off-white, having a cloud on its surface.” Other tests included mixing wine with urine and observing the results. Indeed, alcohol reacts with certain proteins in urine, so this may have had a moderate success rate.

    Nineteenth Century
    Various theories abounded, such as the possibility that pregnancy urine contained certain identifiable crystals or bacteria. Scientists did not know enough about pregnancy to develop a reliable test. However, for sexually active women, the best method for diagnosing pregnancy remained careful observation of their own physical signs and symptoms (such as morning sickness).

    1890s
    Many physicians began to describe the workings of chemicals in the body, suggesting that “internal secretions” by certain organs were crucial to an understanding of human biology. Ernest Starling named these chemical messengers “hormones.”

    American public health advocates started to encourage women to see their doctors as soon as possible after pregnancy was suspected. Prenatal care was found to improve the health of both infants and mothers, even though most women would not see a doctor or midwife until well into the pregnancy.

    1900-1970

    1903
    Research on human reproduction intensified in the early twentieth century. Ludwig Fraenkel described the corpus luteum, the glandular mass that forms in women’s bodies during the normal menstrual cycle that we now know is supported by hCG during pregnancy. He identified some hormones that had a role in female reproduction, naming the hormone that promoted gestation, progesterone. Progesterone was isolated (an important step in the study of hormones) in 1934.



    MORE ON THE SITE LISTED AT THE TOP!!

  2. #2

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    That is pretty interesting! Thanks for sharing!



  3. #3
    Join Date
    May 2011
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    EVV IN
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    Fascinating stuff!!! Its crazy how in 1979 an at home pregnancy test takes 2 hrs but, now it can take only a couple of minutes.



  4. #4
    logan99 Guest

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    it is cool

  5. #5
    Join Date
    Nov 2011
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    How interesting! Thanks for sharing!
    Jennifer


  6. #6
    Join Date
    Oct 2012
    Posts
    1

    Default

    Your information is really cool..thanks

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