Why you might see this term
Irregular or absent periods can prompt a discussion about ovulation, hormones and possible underlying causes. A calendar app cannot establish whether an egg was released.
What to keep in mind
One unusual cycle does not identify the cause. Persistent changes deserve assessment, especially when you are planning a pregnancy.
Sources & further reading
Prepared by ProFertility · Updated 23 October 2026.
Educational information based on the linked sources. This explanation is not an individual diagnosis or a treatment recommendation. A term appearing here does not mean the test is necessary or included in a particular kit.
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