Hello and welcome to HCM
The result of pregnancy
test depends at the time of the test done.
The pregnancy hormone (HCG
) can be detected in blood 11 days post conseption and in urine 12-14 days after conception.
Levels of HCG double within 72 hours.
Levels above 25 mIU/ml is confirmatory for pregnancy and levels below 5 mIU/ml is negative for pregnancy.
The routine pregnancy tests are qualitative tests which detect the presence or absence of HCG in bllod or urine.
Quantitative tests are more informative as they give the amount of hormone present in blood or urine.
Low HCG levels are seen in ectopic pregnancy, blighted ovum
A missed abortion
can lead to heavy bleeding but it is difficult to comment on what you saw on the tampon.
Best thing would be to get the histopathological examination of that tissue.
Thanks and take care
Dr Shailja P Wahal