More <bookmarks-menuAbsent menstrual periods - secondaryShow Alternative NamesAmenorrhea - secondaryNo periods - secondaryAbsent periods - secondaryAbsent menses - secondaryAbsence of periods - secondaryAbsence of a woman's monthly menstrual period is called amenorrhea. Secondary amenorrhea is when a woman who has been having normal menstrual cycles stops getting her periods for 6 months or longer. Causes Secondary amenorrhea can occur due to natural changes in the body. For example, the most common cause of secondary amenorrhea is pregnancy. Breastfeeding and menopause are also common, but natural causes.Women who take birth control pills or who receive hormone shots such as Depo-Provera may not have any monthly bleeding. When they stop taking these hormones, their periods may not return for more than 6 months.You are more likely to have absent periods if you:Are obese Exercise too much and for long periods of time Have low body fat (less than 15% to 17%) Have severe anxiety or emotional distress Lose a lot of weight suddenly (for example, from strict or extreme diets or after gastric bypass surgery) Other causes include:Drugs for cancer treatment Medicines to treat schizophrenia or psychosis Overactive thyroid gland Pituitary tumors Polycystic ovarian syndrome Polycystic ovarian syndromePolycystic ovary syndrome (PCOS) is a condition in which a woman has increased levels of male hormones (androgens). Many problems occur as a result ...ImageRead Article Now Book Mark Article Reduced function of the ovaries Premature ovarian failureAlso, procedures such as a dilation and curettage (D and C) can cause scar tissue to form. This tissue may cause a woman to stop menstruating. This is called Asherman syndrome. Scarring may also be caused by some severe pelvic infections.Asherman syndromeAsherman syndrome is the formation of scar tissue in the uterine cavity. The problem most often develops after uterine surgery.ImageRead Article Now Book Mark Article Symptoms In addition to having no menstrual periods, other symptoms can include:Breast size changes Weight gain or weight loss Discharge from the breast or change in breast size Acne and increased hair growth in a male pattern Vaginal dryness Voice changes If amenorrhea is caused by a pituitary tumor, there may be other symptoms related to the tumor, such as vision loss and headache. Exams and Tests A physical exam and pelvic exam must be done to check for pregnancy. A pregnancy test will be done.Pregnancy testA pregnancy test measures a hormone in the body called human chorionic gonadotropin (HCG or hCG). HCG is a hormone produced during pregnancy. It ap...ImageRead Article Now Book Mark Article Blood tests may be done to check hormone levels, including:Estradiol levels Estradiol levelsAn estradiol test measures the amount of a hormone called estradiol in the blood. Estradiol is one of the main types of estrogens.Read Article Now Book Mark Article Follicle stimulating hormone (FSH level) Follicle stimulating hormoneThe follicle stimulating hormone (FSH) blood test measures the level of FSH in blood. FSH is a hormone released by the pituitary gland, located on t...Read Article Now Book Mark Article Luteinizing hormone (LH level) Luteinizing hormoneThe LH blood test measures the amount of luteinizing hormone (LH) in blood. LH is a hormone released by the pituitary gland, located on the undersid...Read Article Now Book Mark Article Prolactin level Testosterone level Thyroid stimulating hormone (TSH) Other tests that may be performed include:CT scan or MRI scan of the head to look for tumors Biopsy of the lining of the uterus Genetic testing Ultrasound of the pelvis or hysterosonogram (pelvic ultrasound that involves putting saline solution inside the uterus) HysterosonogramTransvaginal ultrasound is a test used to look at a woman's uterus, ovaries, tubes, cervix and pelvic area. Transvaginal means across or through the ...ImageRead Article Now Book Mark Article Treatment Treatment depends on the cause of amenorrhea. Normal monthly periods most often return after the condition is treated.A lack of menstrual period due to obesity, vigorous exercise, or weight loss may respond to a change in exercise routine or weight control (gain or loss, as needed). Outlook (Prognosis) The outlook depends on the cause of amenorrhea. Many of the conditions that cause secondary amenorrhea will respond to treatment. When to Contact a Medical Professional See your primary health care provider or women's health care provider if you have missed more than one period so you can get diagnosed and treated, if needed. Review Date: 4/16/2024Reviewed ByJohn D. Jacobson, MD, Professor Emeritus, Department of Obstetrics and Gynecology, Loma Linda University School of Medicine, Loma Linda, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. ReferencesBulun SE. Physiology and pathology of the female reproductive axis. In Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, et al. Williams Textbook of Endocrinology. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 17.Cameron S. Menstruation and amenorrhoea. In: Magowan B, ed. Clinical Obstetrics and Gynaecology. 5th ed. Elsevier; 2023:chap 4.Lobo RA. Primary and secondary amenorrhea and precocious puberty. In: Gershenson DM, Lentz GM, Valea FA, Lobo RA, eds. Comprehensive Gynecology. 8th ed. Philadelphia, PA: Elsevier; 2022:chap 36.Disclaimer The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.