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Some pregnancy tests (as far as I know most/all) use animal antibodies, called monoclonal antibodies. These antibodies are grown/farmed from animals, often mice or rabbits.

Because these pregnancy tests use animal products, I don't think they count as vegan (though that's somewhat subjective). Are there any clearly vegan tests?

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    Waiting for approximately nine months will give you a high accuracy result. You probably should define the constraints at play. The obvious answer would be: as fast and reliable as the non vegan tests but then what about a test that is slightly faster but not as reliable or vice versa? – Nobody moving away from SE Mar 27 '17 at 21:10
  • Just a precision, "monoclonal antibodies" means that a sole antibody is used, as opposition with "polyclonal antibodies" where several antibodies targets differents part of the target. – Edelk Jan 21 '18 at 9:40
  • I doubt that most commercial tests use antibodies from animal origin. Sounds too expensive. Cheaper to manufacture synthetic antibodies. Can someone add a reference to my claim? I was searching online and couldn't find what antibodies are used in pregnancy tests: synthetic or originated from animals – cloud_traveler Jan 28 '18 at 5:19
  • @cloud_traveler just because something can be synthetized, it doesn't mean that's cheaper. There is a reason why many products are still made by growing and harvesting living beings (e.g. carmine food dye, extracted from insects). Going to your claim, all antibodies - monoclonal or polyclonal - need cells extracted from animals to produce them: courses.lumenlearning.com/microbiology/chapter/… – Juliana Karasawa Souza Jun 15 at 12:34
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Tracking of your basal body temperature as described in detail in the lower half of this article - https://www.verywell.com/body-basal-temperature-chart-to-detect-early-pregnancy-1960284 Is an old-fashioned method of identifying a pregnancy which would avoid the use of animal antibodies.

Further scientific source: https://www.mayoclinic.org/tests-procedures/basal-body-temperature/basics/definition/prc-20019978

For more information regarding the proven correlation between basal body temperature and ovulation/gestation: https://www.webmd.com/baby/tc/basal-body-temperature-bbt-charting-topic-overview

Also see: https://baby-pedia.com/charting-body-temperature-pregnancy-change/

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    Can you find some scientific evidence that this method works? Or numbers that measure its accuracy? – Turion Feb 5 '17 at 11:42
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    @Turion sorry, your comment suggest you don't understand the scientifically proven correlation between basal body temperature and ovulation/gestation. For more details on that please see webmd.com/baby/tc/… – ShanMag Feb 5 '17 at 13:03
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    I don't doubt that there is a correlation. Please don't take my comment as a starting point for a rant. As you certainly know, a correlation has rarely coefficient 1, so a correlation need not be perfect. Furthermore, I'm asking about the accuracy of the method. E.g. in theory, condoms absolutely prevent pregnancy, but in practice, there is a risk that it doesn't work. So I'm asking now what the risk of this method is. – Turion Feb 5 '17 at 13:09
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    Also, while it's great that you're supplying further links for your claims, they aren't really scientific sources (i.e. published in a peer-reviewed journal on medicine or biology). – Turion Feb 5 '17 at 13:12
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    @Turion Rant? I fear you read some sort of tone into my comment that I promise you was not there, just trying to understand your comment further. The Mayo Clinic article is very much a scientific source and a lot of peer-reviewed medicial journals are its groundwork (they're listed at the bottom of the article itself)? – ShanMag Feb 5 '17 at 13:20
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Late to this but the answer is a solid no if you're looking for commercially available Beta-HCG tests. According to this guidance by the FDA:

Presently, all of the home pregnancy tests available use monoclonal or polyclonal antibodies in an enzyme-linked immunoassay format.

And getting into the merit of production, all antibodies need animal cells to be produced at one point or another - you could argue that monoclonal antibodies are "the lesser of two evils" (so to say) since the production is mostly done via cell culture, but the "blueprint" for the antibody came from an animal that was injected

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