8 Possible Causes for a False | 合法醫療器材資訊網

2020年7月7日—WhatCausesaFalse-PositivePregnancyTest...Thereasonsforafalse-positivepregnancytestrangefromtestingtooearlyandpickingupona ...

First things first: OTC pregnancy tests measure a hormone called human chorionic gonadotropin (HCG)[1] in your urine that’s released in spades during pregnancy — especially at the beginning. As long as you are taking the test correctly (more on that later), a positive result means there is HCG in your urine, explains Jaime Knopman[2], M.D., director of fertility preservation for CCRM New York.

But here’s the thing: HCG can be present at low levels in the body even you’re not pregnant — and just because a test is positive for HCG doesn’t mean that the pregnancy is going to progress normally. While you’ve likely heard that 10 to 20 percent of known pregnancies end in miscarriage[3], the true number is likely higher because miscarriages can happen before you even know you’re pregnant. “Nearly 25 to 30 percent of early positive pregnancy tests do not progress normally,” estimates Dr. Knopman. So, if you get a positive te...