sandflower
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Hello Everyone,
I looked up false negative hcg tests and found info on the variant hook effect that some might find interesting. I'm not sure about link posting rules, so you can search it on google.
In the women who are affected by it (it's harmless to the baby), tests done later in pregnancy can be lighter than tests done earlier, or an actual false negative occurs. It is much more common than the hook effect some people talk about, where hcg levels are so high they ruin the test. The cure is the same: dilute the test urine and retest it.
The variant hook effect works like this: At, or after, 5 weeks of pregnancy there can potentially be enough hcg that has broken down into incomplete parts in the urine that there is an abundance of hcg beta core fragments. These are a particular formation of the broken down hcg, and are only found in the urine. If someone for some reason has too many hcg beta core fragments they will saturate one of the antibodies used for hcg tests and are unable to bind to the other antibodies on the test, leaving a false negative.
I looked up false negative hcg tests and found info on the variant hook effect that some might find interesting. I'm not sure about link posting rules, so you can search it on google.
In the women who are affected by it (it's harmless to the baby), tests done later in pregnancy can be lighter than tests done earlier, or an actual false negative occurs. It is much more common than the hook effect some people talk about, where hcg levels are so high they ruin the test. The cure is the same: dilute the test urine and retest it.
The variant hook effect works like this: At, or after, 5 weeks of pregnancy there can potentially be enough hcg that has broken down into incomplete parts in the urine that there is an abundance of hcg beta core fragments. These are a particular formation of the broken down hcg, and are only found in the urine. If someone for some reason has too many hcg beta core fragments they will saturate one of the antibodies used for hcg tests and are unable to bind to the other antibodies on the test, leaving a false negative.