Prama - I think you may be a bit confused about what was posted.
OPK _ ovulation test- These are 20miu. from Lullaby. YOu can get dip in the cup or pee on the stick varieties and they are all equally accurate. If you had a 10miu ovulation test you would get a positive and not be surging. I wouldn't think that a 10miu ovulation test could be found on the market for this reason.

The original poster was asking about pregnancy tests. These come in 10miu or 20miu from Lullaby.