When to start OPK?

Question

So I'm spotting and assuming AF will be here tomorrow or Tuesday, and I want to look ahead to trying after. When should I start using my OPK?

Answer

Depends on how long your cycles are. The boxes usually have a little timeline to show you. My cycle is averaged at 26 days, so the box said to start testing around cd9. Although I haven't O'd yet (according to the sticks). I've found it's worth it to get the jumbo boxes of opks, as if you miss it one cycle, you have more for next. Or if your cycle is longer, you'll want to start at a different day, and it may go longer than expected. Example: cd9 was last Monday, I still haven't O'd, and that's 7 tests later.

When to start OPK?

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