I had blood taken last Friday to have my hormone levels checked to see if my spotting was being caused by an imbalance....I went home and POAS and that was my 1st BFP.

This was at 9DPO....anyhow, my friend is the nurse who took my blood, so today she rang pathology to have them check for HCG in the sample they still had.

It detected negative.

We were chatting and were wondering if perhaps because the sample was 4-5 days old, whether this could effect it?

Could 9DPO have been too early?

Hmmmm just wondering why a pregnancy test would detect it and not a blood test.