PMS and painful periods:
Stress
Seasonal affective disorder
A diet high in simple carbohydrates
Never having had a baby
Irregular bleeding:
A diet high in fat
Being overweight
Fibroids:
More common in black women
Ovarian cysts:
Taking certain drugs for epilepsy
A history of bulimia
Pelvic inflammatory disease
The presence of endometriosis
Being overweight
Endometriosis
Using an intrauterine device
Taking tamoxifen for breast cancer
Certain abdominal surgical procedures