When lh surge on opk goes back negative have you already O'd

Question

Mine was blaring positive yesterday morning and this morning still pos and now negative so did I already O :)

Answer

I've questioned this myself quite a bit. I personally think the answer is no. The ovulation test only tests for hormone surges, but not the actual ovulating moment. Therefore, you could peak on a Monday and ovulate within 48 hours, I.e. Tuesday or Wednesday. Confirmation of a thermal shift could help with pinpointing this.

When lh surge on opk goes back negative have you already O'd

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