the right time

She didn't know she was pregnant until about an hour before she gave birth. 

  Dollar Store pregnancy tests are as sensitive, or even more sensitive than the brand name strips

A few tests can quantify as low as 15miu, while others require no less than 50 to get a positive. This diagram shows regular brands and their sensitivity It would appear, the Dollar store brand midstream and mini-strip can identify as low as 20 miu, while a percentage of the more extravagant brands require 40-50miu. 

In the event that you are anything like my wife, when attempting to get pregnant, you will test 2-3 times each day, consistently amid the ideal time. I knew I would go broke purchasing those two packs of first response or ept for $18, so I went to Dollar store and purchased 20 tests. They really keep them close to the cashier - evidently individuals take these things. 

The Dollar store brand got positives when the first response did not. Blood tests at the specialist later affirmed the pregnancy. I did spend $20 on those advanced ones that have the readout that says "pregnant" - she needed that as a keepsake.