because the battery might go bad pretty soon after
The issue is that my husband and I bought these a year before we finally conceived through IVF.  So I had saved them for once my stick test result showed positive.  They did not expire yet according to the package, but the battery was already dying.  So there was just a question mark, and the clock never showed up to indicate that it was trying to calculate a result.  Finally I opened the test and found the line underneath, so I played around with the battery and it said 'yes.'  So maybe only buy these after you have gotten a positive stick test, because the battery might go bad pretty soon after.<br /><br />Update, a friend just told me that these will also show a line for negative tests, too.  So maybe just use another dipstick test instead of these.  Wouldn't recommend.
Rating: 3 stars