A period is generally considered late if it is more than 7 days past the expected start date. Periods can normally vary and be late by a few days without concern, but if a period is over 6 weeks late, it is typically classified as a missed period. A delay of one week or more may warrant taking a pregnancy test if pregnancy is a possibility. Beyond pregnancy, late periods can be caused by stress, weight changes, exercise, hormonal birth control, medical conditions, and other factors. For consistent or very late delays (beyond 35-40 days or months without menstruation), it is advisable to consult a healthcare provider to check for underlying causes. In summary:
- A period 1-2 days late is usually not concerning.
- 7 days late or more is considered late.
- After 6 weeks (around 42 days) without a period, it is a missed period.
- Variations in cycle length (24 to 38 days) are common.
- Late periods may need medical attention if they persist or are accompanied by other symptoms.
This information is based on up-to-date medical advice as of 2025.
