Possible causes of irregular menstrual cycles include uncontrolled diabetes, eating disorders, hyperthyroidism or hypothyroidism, hyperprolactinemia, certain medications, and perimenopause, according to the National Inst... More »

www.reference.com Health Women's Health Menstruation

Changes in the menstrual cycle can result from taking contraception, eating disorders, stress, lack of sleep, or a sharp increase in exercise, among many other factors, according to WebMD. Other factors that can affect a... More »

A short menstrual cycle can be the result of a wide variety of conditions. MedGuidance.com reports that any significant change in estrogen levels can cause variation in the length of the menstrual cycle, including normal... More »

Changes in the menstrual cycle can result from taking contraception, eating disorders, stress, lack of sleep, or a sharp increase in exercise, among many other factors, according to WebMD. Other factors that can affect a... More »

A woman who experiences two periods in one month may be reacting to a medication, have thyroid imbalances such as hypothyroidism or hyperthyroidism, or suffer from uterine polyps or fibroids, according to EmpowHER. Extre... More »

www.reference.com Health Women's Health Menstruation

There are many reasons why a woman’s period might come early, including severe weight loss or gain, certain medications, metabolic syndromes, endocrine disorders, stress or the onset of perimenopause. Experts consulted b... More »

Brown menstrual blood is likely just old blood that is slowly leaving the uterus, especially if it occurs towards the end of a woman's cycle, explains WebMD. The presence of brown blood may also accompany heavy bleeding ... More »

www.reference.com Health Women's Health Menstruation