Almost all branded pregnancy tests in Ireland are in midstream format
e.g. Clearblue & First Response. The word midstream is derived from the way the sample is collected – midstream! In this format, the sample is collected by urinating directly on the top of the stick. Midstream pregnancy tests are normally the least sensitive of all the tests but the First Response brand while expensive is very sensitive and can be used as early as 6 days before your period is due. People choose these tests for their ease of sample collection or because they simply trust the brand names, they go by.