They are a rip-off that don't work! I ALWAYS saw ferning (I have PCOS so that explains it). But even 'normal' women get funny results, they are just not worth it! I have offered on these types of threads several times to give mine away but I can't even give it away it's that cr@p. OPKs work reliably. Even monitoring CM is reliable once you know what you're doing, and it doesn't cost a thing!