I tested all day long about 6 tests from 9am-now 11:45 pm as of 9:30pm my opk was still positive now at 11:45 pm it’s not. Is it normal for a opk to only be positive for 12 ish hours?

opk was still positive now at 11:45 pm it’s not. Is it normal for a opk to only be positive for 12 ish hours?" />

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