why is my period late but i'm not pregnant

A period can be late even when a person is not pregnant due to a variety of reasons. Common causes include stress, significant changes in weight (either loss or gain), excessive exercise, hormonal imbalances such as thyroid disorders, conditions like polycystic ovary syndrome (PCOS), breastfeeding, approaching menopause or perimenopause, and certain medications or contraceptives. Sometimes, irregularities can also be linked to rare conditions like primary ovarian insufficiency (POI) or other chronic diseases. Lifestyle factors, emotional stress, and changes in diet or physical activity often disrupt the hormonal signals that regulate the menstrual cycle. If the issue persists for several months or is accompanied by other symptoms, consulting a healthcare provider is recommended for diagnosis and appropriate treatment.