What may be reasons for failure of the SERATEC® pregnancy test?

All sorts of membrane tests are highly sensible to humidity. The shelf life of the SERATEC® pregnancy tests may last up to several years as long as it remains sealed in a pouch containing a drying-gel envelope inside (standard packing conditions). Tests exposed to regular air humidity without being used may loose sensitivity after some hours and show only very thin lines in both the indication and the control regions, or no lines at all. Damage of the pouch may lead to loss of sensitivity as well. A severe quality control (manually performed) mostly prevents for the distribution of damaged Tests.