I am using clear blue advance opk for the first time. For the past three days it’s showed low fertility. This morning I thought I had to go bar but only a little urine came out. The test showed working and gave me a solid smilie face indicating peak.
Can I trust this? Is it possible to jump from low fertility past high fertility, right to peak fertility within hours? (I took last opk last night showed low fertility, it’s now AM). If I can trust this when should I ovulate?
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