Litt fakta om hcg og hjemmetester (link og utdrag)

[Helga80]

Link: http://www.cbsnews.com/stories/2003/01/27/earlyshow/health/main538075.shtml

 

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).

 

"Some kits improve in detection when read after a wait of 10 minutes, but waiting longer than that may produce a negative result that looks faintly, misleadingly positive," CR reports.

 

about one-third to one-quarter of pregnancies implant for a short time, then fail. "That leads to a transient rise in hCG, which can extend for as long as two days after the day of the missed menstrual period."

 

One kit, the First Response Early Result Pregnancy Test, emerged as the most reliable and sensitive test. "It detected hCG at concentrations as low as 6.5 mIU/ml (thousandths of an International Unit per milliliter) - that's almost sensitive enough to detect any pregnancy soon after implantation," CR wrote. "Most other kits were far less sensitive - the five least sensitive tests couldn't detect hCG below concentrations of about 100 MIU/ml at their specified reading times. However, when we waited a full 10 minutes before reading the results, seven of the test kits performed much better than they did at the manufacturer's suggested waiting time."