I would test with whatever brand/sensitivity you plan to test with on OTD (or before if you're impatient)
Reason being, I've seen people test out the trigger with an IC, get a clear BFN at day 8dpt and then get a squinter on a FRER two days later, think it's a BFP and it not be....it's just the FRER picked up more than the IC from trigger IYSWIM?
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