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What's the difference

(9 Posts)
MadameLeBean Sat 22-Mar-14 15:26:26

Between 10mlU and 20mlU test strips? Want to buy the cheap ones from amazon but what do these numbers mean?

FrankelandFilly Sat 22-Mar-14 15:28:47

It's their sensitivity. The lower the number the more sensitive they are to detecting HCG.

MadameLeBean Sat 22-Mar-14 15:38:16

Thank you. Stupid question but why would anyone buy (or make)the higher number ones then?

RPopz Sat 22-Mar-14 16:12:01

Because they are more accurate.

MadameLeBean Sat 22-Mar-14 16:35:01

So 10 is more sensitive but 20 is more accurate??

How does that make sense? So more likely to get a false positive/negative with the 10s?

RPopz Sat 22-Mar-14 16:39:54

Sensitivity simply refers to the lowest possible amount of bhcg the test can detect. Accuracy is whether the result it gives is "true". A negative from a 20u/ml is more likely to be a true negative than a negative from 10u/ml test.

MadameLeBean Sat 22-Mar-14 16:50:46

Ok that makes sense.. Thanks

MadameLeBean Sat 22-Mar-14 16:51:00

I ordered both types anyway lol

RPopz Sat 22-Mar-14 17:01:18

Fingers crossed you'll only need one!

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