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TABLE 2

Causes of Menstrual Irregularity

Pregnancy 
Endocrine causes 
    Poorly controlled diabetes mellitus 
    Polycystic ovary syndrome (PCOS) 
    Cushing disease 
    Thyroid dysfunction 
    Premature ovarian failure 
    Late-onset congenital adrenal hyperplasia 
Acquired conditions 
    Stress-related hypothalamic dysfunction 
    Medications 
    Exercise-induced amenorrhea 
    Eating disorders (both anorexia and bulimia) 
Tumors 
    Ovarian tumors 
    Adrenal tumors 
    Prolactinomas 
Pregnancy 
Endocrine causes 
    Poorly controlled diabetes mellitus 
    Polycystic ovary syndrome (PCOS) 
    Cushing disease 
    Thyroid dysfunction 
    Premature ovarian failure 
    Late-onset congenital adrenal hyperplasia 
Acquired conditions 
    Stress-related hypothalamic dysfunction 
    Medications 
    Exercise-induced amenorrhea 
    Eating disorders (both anorexia and bulimia) 
Tumors 
    Ovarian tumors 
    Adrenal tumors 
    Prolactinomas 
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