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The hypothalamus is very affected by stress.. So if youâre dealing with a big move, death in the family, huge breakup, or any other life event that's shaking you up, it could be the cause of your late period or missed period. A Thyroid Irregularity. The thyroid gland, located in your neck, regulates your metabolism.
What does it mean if your period is 12 days late? A: Late or absent menstrual periods can be caused by pregnancy, stress, travel and drug use, according to WebMD. Birth control pills and medical conditions such as polycystic ovary syndrome can also cause missed or irregular menstrual periods.