Certain medications, birth control pills and digestive conditions, such as irritable bowel syndrome, can cause two menstrual periods in one month, according to WebMD. Irregular menstrual cycles can also be brought on by weight gain or eating disorders such as anorexia nervosa.
Additional medical conditions that may trigger abnormal menstrual periods include cervical cancer; sexually transmitted diseases, such as gonorrhea; thyroid cancer; and ovarian cysts, explains Mayo Clinic. Perimenopause is a natural condition that develops in women who are approaching menopause. During this time, irregular menstrual periods are common. It is important for perimenopausal women to consult with a physician as there are treatments available that can help to minimize uncomfortable symptoms.
Hyperthyroidism, a medical condition that causes the thyroid gland to produce excess amounts of thyroid hormones, can also trigger irregular menstrual periods, explains MedlinePlus. Additional symptoms of hyperthyroidism include concentration difficulties, heavy sweating, intolerance of heat, and sleep disturbances. A variety of factors cause hyperthyroidism, including ovarian cancer and inflammation of the thyroid gland following pregnancy. Hyperthyroidism is treatable with medications, radioactive iodine treatments that halt hormone production, and surgical removal of the thyroid gland. Complications of the condition include abnormal heart rate and osteoporosis, so it is important for women who are experiencing irregular menstrual periods that are accompanied by additional symptoms of hyperthyroidism to consult with a physician.Learn More
A woman's ovaries do not alternate every month to release an egg during ovulation, according to BabyCenter. One of a woman's two ovaries randomly releases an egg during ovulation.Full Answer >
Menstrual periods allow the female body to discharge excess uterine tissue and eggs when fertilization doesn't occur, according to KidsHealth. In preparation for ovulation, the hormone estrogen causes the uterine lining to thicken with extra tissue and blood, creating a cushioned surface for a fertilized egg to attach to. Instead of attaching, an unfertilized egg passes out of the body through the vagina, and the unneeded tissue is shed.Full Answer >
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 woman's menstrual cycle include pregnancy, breastfeeding, polycystic ovary syndrome, pelvic inflammatory disease and uterine fibroids, according to the Mayo Clinic.Full Answer >
Stress and extreme weight fluctuations may cause the menstrual period to arrive a week early, according to CNN. For some women, antidepressants, thyroid disease or polycystic ovary disease is the culprit.Full Answer >