The difference between David's crystal edition and ordinary edition

There is a difference in reaction speed.

According to mom's website, David's crystal pen is faster than the test paper. David's crystal plate is a professional pregnancy measurement tool, while the test paper is of ordinary design, and its response speed is not as fast as David's crystal plate. Crystal pregnancy test stick is more sensitive than ordinary test paper, and the display window is twice as large as ordinary test paper. Even if the early pregnancy is gray, the crystal pen can clearly show it.

The principle of David's pregnancy test stick is the same, which is used to test early pregnancy. Generally speaking, the sensitivity of pregnancy test stick is higher than that of test paper, which can be measured about 14 days after sexual life.