Thought I would post this for anyone who is interested. I haven’t had an over abundance of pregnancy tests in the house but I do have left over OPKs. I did one on Thursday night, Friday morning, Saturday morning and today (so 12 dpo to 15)
It’s nice to see them getting darker. Short and sweet post here but I find the whole OPK as HPT thing quite interesting!
UPDATE: I have to add this picture as well as it made me do a little happy dance
I don’t know if this is true but I did read somewhere that the conception indicator works like this
1-2 weeks – hcg level of 50-200 (96.5% accurate – the accuracy rating comes from Clear Blue’s own literature so I know that bit at least is true)
2-3 weeks – hcg level of 200-2000 (76.1% accurate)
3+ weeks – hcg level of 2000+ (96.9% accurate)
It’s also worth nothing that above 3 weeks the accuracy level can drop a lot (don’t have a specific figure about that). This is because of the Hook Effect. Basically the hcg levels can be so high that they overwhelm the test and it gives weird results. Some people testing with a regular HPT may find that they get a very faint line, or even a negative, but if they use a more dilute sample they will get a strong line again.
And to round this bit on CB Digis off here is a picture of the strips from the test after I broke it open (which you’re really not supposed to do).
The top is a low sensitivity strip and the bottom is a high sensitivity strip. I have broken a few digitals open in my time and while they might not always have lines this dark they have absolutely ALWAYS had 2 lines on the top strip and one on the bottom (kind of wish I had taken pictures before). So…. cracking open a digital is not a reliable way to determine whether or not you actually have a BFP and the digi processor just isn’t picking it up. http://www.peeonastick.com has a great section on this.