how do I use these?

Charlene • TTC for 11 months and nothing 😞 any tips would be greatly appreciated! Xoxo
Me and my husband have been TTC for 10 (going on 11 months) now and have had no luck. My periods are like clockwork but I'm terrified I'm not ovulating, is that possible? To get regular periods but not ovulate? 
I ordered these (a pack of 50 ovulation strips) but I've never used them before, is there a certain way to use them for an accurate reading? 
Thank you ladies 

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