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2. Pregnancy test - Wikipedia

   en.wikipedia.org/wiki/Pregnancy_test

   Secretion of hCG can occur as soon as 6 days following ovulation and on average 8–10 days following ovulation; this is the earliest hCG can be detected in a blood sample. [7] [5] [8] The hCG concentration in blood is higher than in urine. Therefore, a blood test can be positive while the urine test is still negative. [9] [10]

3. *This* Is The Best Time Of Day To Take A Pregnancy Test For ...

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   The earliest a test can detect the hormone in urine is about the six days before the day of the menstrual period that would be missed, says Mary Jane Minkin, MD, a clinical professor of obstetrics ...

4. Fact check: Claim that pregnancy can be detected the day ...

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   A pregnancy test detects the presence of the pregnancy hormone human chorionic gonadotropin in a person’s body. The body doesn’t produce that hormone until several days after conception.

5. Pregnancy hormones - Wikipedia

   en.wikipedia.org/wiki/Pregnancy_hormones

   Urine-based pregnancy tests detect hCG in the urine, while blood-based pregnancy tests measure the level of hCG in the blood. [5] The presence of hCG in a woman's body indicates that a fertilized egg has implanted in the uterus and the placenta has started to form. 10 days after fertilization, significant hCG can be detected from woman's blood ...

6. Gravindex - Wikipedia

   en.wikipedia.org/wiki/Gravindex

   Gravindex is an agglutination inhibition test performed on a urine sample to detect pregnancy. [1] It is based on double antigen antibody reaction. The test detects the prevention of agglutination of HCG-coated latex particles by HCG present in the urine of pregnant women. [2]

7. Pregnancy tests using animals - Wikipedia

   en.wikipedia.org/wiki/Pregnancy_tests_using_animals

   Before immunological pregnancy tests were developed in the 1960s, women relied on urine-based pregnancy tests using animals, ranging from mice to frogs. [1] [2] Advancements in medical technology have enabled women to accurately check their pregnancy status by using 'pee-on-a-stick' pregnancy test kits at home. Before these accessible and ...