It explains that testing for hCG is not the same in all women. In 10 percent of pregnant women, the embryo does not implant until after the first day of a missed period (and again, hCG is not produced until the embryo implants in the uterine wall).
"Until implantation, it doesn't matter how sensitive the test is," CR says, "You can't detect the pregnancy before it's producing the stuff that you're measuring, which is hCG."
Even pregnancies that have implanted may produce too little hCG for many at-home tests to detect, especially only a day or two after a missed period and when read after the manufacturer suggested waiting period specified in test packaging.
This was encouraging to read....Hopefully I still just have too little HCG to detect. I am going to buy the First Response Tests tomorrow if not AF through the night.
Linear Mode
