The causes of false positive pregnancy test

Appearance of positive line in pregnancy test kit in absence of pregnancy is called false positive test result,



That can be seen in conditions like,

-errors of test application,

reading test after suggested 3 to 5 minute window or reaction time,

kit with past expired date

-taking hCG injection as part of infertility treatment,

 

-in some diseases of liver, carcinomas

- medical conditions which will produce elevated hCG leading to false positive test.

choriocarcinoma, 

germ cell tumors,

IgA deficiency,

Heterophile antibodies,

Gestational trophoblastic diseases and neoplasms