4 doctors weighed in:
What can cause a late period? And how long can a late period be?
4 doctors weighed in

Dr. Khurram Rehman
Fertility Medicine
2 doctors agree
In brief: Many possible causes
Pregnancy, or not ovulating (releasing an egg) makes your period late by weeks or months.
Common causes are polycystic ovarian syndrome (pcos), underactive thyroid, excess prolactin hormone, aging of the ovary (diminished ovarian reserve), or low hormone levels (hypogonadism) from heavy exercise, eating disorders, or stress. See ob/gyn for tests; reproductive endocrinology / infertility md if ttc.

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In brief: Many possible causes
Pregnancy, or not ovulating (releasing an egg) makes your period late by weeks or months.
Common causes are polycystic ovarian syndrome (pcos), underactive thyroid, excess prolactin hormone, aging of the ovary (diminished ovarian reserve), or low hormone levels (hypogonadism) from heavy exercise, eating disorders, or stress. See ob/gyn for tests; reproductive endocrinology / infertility md if ttc. Speak with a doctor now ›
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Dr. Khurram Rehman
Fertility Medicine , 18 years in practice
Dr. Vance Harris
Family Medicine
1 doctor agrees
In brief: Late period
Pregnancy, not ovulation that month, stress, physical stress or illness.
At early age cycles are not always on time. Anything between 2-6 weeks could be due to one of those causes. Athletes may also suppress normal cycles with extremes of exercise.

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In brief: Late period
Pregnancy, not ovulation that month, stress, physical stress or illness.
At early age cycles are not always on time. Anything between 2-6 weeks could be due to one of those causes. Athletes may also suppress normal cycles with extremes of exercise. Would you like a more personalized answer to your question? ›
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Dr. Vance Harris
Family Medicine , 29 years in practice
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Dr. Shontae Buffington
Board Certified, Pediatrics
13 years in practice
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