A missing period can be extremely annoying, especially when your mind immediately jumps to pregnancy, infertility, or something being seriously wrong. First, take a breath. We will figure it all out.
Amenorrhea is the medical term for absence of periods, but one late or missed period is not always a sign of a serious problem, and many reasons are temporary and can be treated.1 Other times, it’s your body gently trying to tell you that it needs a bit of attention. It’s okay to listen to your missing period, but don’t beat yourself up or start blaming yourself for it. You deserve an OB-GYN who understands you, who lets you know what they plan to do and takes your opinion into account.
On this page
- What does amenorrhea actually mean?
- Types of amenorrhea
- Are you a teenager or in your 40s?
- What could be causing my missing periods?
- Why is it important to know the cause of a missed period?
- What should I track before I visit the doctor?
- What will happen at the appointment?
- How is amenorrhea treated?
- When to see a doctor?
Key takeaways
- Amenorrhea means missing periods entirely; one or two late periods isn’t amenorrhea.
- Rule out pregnancy first: test on the day of a missed period; repeat if negative and the period doesn’t return.
- Common causes: pregnancy, breastfeeding, menopause, birth control, stress, poor nutrition, intense exercise, PMOS, thyroid issues, high prolactin, POI, scarring, or anatomical differences.
- Primary amenorrhea is when there is no period by age 15, none by 3 years after breast development starts, or no breast development by age 13.
- Secondary amenorrhea is when periods stop for 3+ months (previously regular) or 6+ months (previously irregular).
- If left untreated, some causes can affect bone health, fertility, metabolism, and emotional well-being.
- Severe abdominal pain, shoulder pain, dizziness, or fainting with possible pregnancy can be ectopic and needs emergency care.
- Treatment is based on the underlying cause rather than simply triggering a bleed and may include nutrition support, stress management, medication, hormone therapy, fertility support, or a uterine scarring or anatomical blockage procedure.
What does amenorrhea actually mean?
Amenorrhea simply means not having menstrual periods.1 It is not a diagnosis, but rather a symptom with several possible causes. The majority of these causes are manageable once you know what is happening.
What are the types of amenorrhea?
- Primary amenorrhea: It is when your first period doesn’t occur by age 15, or about 3 years after breast development.12 Evaluation is also recommended when there is no breast development by age 13.3
- Secondary amenorrhea: It simply refers to periods that have stopped for at least 3 months (after previously regular cycles) or for at least 6 months (after previously irregular cycles).2
- Physiological amenorrhea: Bleeding may cease as a result of pregnancy, breastfeeding, or menopause, and this does not indicate a problem.4
If you miss one period, this doesn’t necessarily mean you have amenorrhea. Cycles sometimes shift. It’s important to see if pregnancy is possible, how long the change is continuing for, and if other symptoms are present.24
Are you a teenager or in your 40s?
In the first couple of years after your first period, bleeding can be irregular, which is quite normal as the hormonal system matures. However, very long gaps, heavy bleeding, severe pain, or irregularity that doesn’t go away should be talked over with a healthcare professional.3
Similarly, periods can also become irregular during perimenopause (the natural time before your periods stop completely). Some months may not have ovulation (release of an egg for conception), and cycles may become shorter or longer, bleeding may be lighter or heavier, and some months may be skipped. While these changes are common to this phase of life, a missed period should not be interpreted as necessarily being menopause (natural cessation of periods), as pregnancy remains a possibility during perimenopause.3
What could be causing my missing periods?
| Possible cause | What may be happening | What else might you notice? |
| Pregnancy, breastfeeding, or menopause4 | Pregnancy stops ovulation while pregnancy hormones maintain the uterine lining. Breastfeeding can suppress the hypothalamic-pituitary-ovarian (HPO) axis, while menopause occurs as ovarian follicle activity declines4 | Pregnancy symptoms (when pregnant), nursing (when breastfeeding), midlife cycle changes, and hot flashes (in menopause)4 |
| Ectopic pregnancy (pregnancy outside the main cavity of the uterus)5 | Fertilized egg implants outside the uterus, most commonly in the fallopian tube (which connects the ovaries to the uterus). As it grows, it may cause the tube to rupture and lead to internal bleeding5 | Lower back pain, tender breasts, upset stomach, mild abdominal pain, mild cramping on one side of pelvis (if unruptured), sudden severe abdominal pain, shoulder pain, weakness, dizziness or fainting (if ruptured)5 |
| Stress, dietary changes and intense training678 | Disrupts the hypothalamic hormones that regulate ovulation68 | Changes in mood, hair loss, vaginal dryness, low sex drive, headaches6 |
| Hormonal contraception (use of methods or devices to prevent pregnancy) or menstrual suppression (use of medicines or devices to safely stop menstrual bleeding)19 | Pills, injections, implants, hormonal intrauterine devices, or other hormone treatments may thin the uterine lining or intentionally stop bleeding9 | The change began after starting or changing treatment |
| Functional hypothalamic amenorrhea6 | When the body is not fueled enough or is stressed, the brain lowers reproductive hormones in the body6 | Restrictive eating (eating disorders such as anorexia nervosa), trouble sleeping, hair loss, headache, low energy, vaginal dryness, low sex drive6 |
| Polyendocrine Metabolic Ovarian Syndrome (PMOS); previously known as polycystic ovary syndrome (PCOS)1011 | The hormonal and metabolic changes cause ovulation to occur infrequently1011 | Acne, excess facial and body hair, hair loss on the head, and insulin resistance1011 |
| Thyroid disease12 | High or low thyroid hormone levels can affect periods and ovulation12 | Fatigue, changes in weight, feeling unusually cold or hot, constipation, tremors, or a racing heartbeat12 |
| High prolactin or a pituitary condition413 | Prolactin may inhibit the hypothalamic-pituitary-ovarian (HPO) axis, leading to suppression of hormones required for ovulation. Certain medicines increase prolactin levels too413 | Milky nipple discharge (when not nursing),13 headaches, changes in vision or anosmia4 |
| Premature ovarian insufficiency14 | Ovarian function declines prematurely (before age 40), often unexpectedly14 | Hot flashes, night sweats, vaginal dryness or low sex drive14 |
| Uterine scarring (Asherman syndrome)15 | Scars form inside the uterus after some pregnancy-related procedures or uterine surgeries15 | Very light or missed periods following a procedure, and cramps may continue every month15 |
| An anatomical or congenital difference (such as MRKH syndrome, i.e., Mayer-Rokitansky-Kuster-Hauser syndrome),16 an imperforate hymen, or a vaginal septum4 | The uterus and vagina can be missing or undeveloped16 or blocked, which may prevent period blood from leaving the body4 | No first period despite other puberty changes like normal breast development and pubic hair16 |
| Genetic or developmental conditions (such as Turner syndrome)417 | Dysfunctions of hormone signaling can be responsible for failure of normal puberty or ovarian function4 | Delayed puberty, absence of breast development, short height, or other condition-specific features4 |
| Chronic illness, cancer treatment, or medication4 | Long-term illness, radiation, and chemotherapy or certain medicines may result in hypothalamic-pituitary-ovarian (HPO) axis suppression or endometrial atrophy4 | The timing corresponds with an illness, treatment, or medication change |
Why is it important to know the cause of a missed period?
The first question that always comes to mind is, “Could I be pregnant?” The thought of pregnancy can definitely cause unnecessary stress, so just to be sure, it’s best to take a home pregnancy test starting from the first day of a missed period, but it might be negative if the test is taken too early. Try the test again according to the directions, or consult a healthcare provider if the period still doesn’t come.18
Some may primarily cause irregular periods. Others can also negatively affect your bone health, uterine lining, metabolism, fertility, or emotional health.
For instance, low estrogen due to long-term hypothalamic amenorrhea or POI (Premature Ovarian Insufficiency) can make bones weaker.614 Infrequent ovulation due to PMOS may increase the risk of endometrial hyperplasia (thick uterine lining).410
This does not indicate that it will necessarily cause damage. It simply means that once you have the right explanation, your clinician will be able to preserve those aspects of your health that are important to you.
What should I track before I visit the doctor?
The following short notes will help make your appointment easier:
- The last period date and usual period pattern
- Pregnancy-test dates and results
- Recent changes in weight, diet, exercise, sleep or stress
- Any new symptoms
- Medications, supplements and contraception
- Pregnancy, birth, miscarriage, procedures or cancer treatment
- Whether you desire pregnancy, or if it is desired later or not at all
Also discuss with your healthcare professional any changes that occurred around the time your periods stopped, particularly:
- Acne, new facial hair or hair loss on the scalp
- Hot flashes, night sweats or dryness of the vagina
- Milky nipple discharge
- Headache or vision changes
- Pelvic pain or abdominal cramps that occur every month unrelated to menstruation
- Symptoms of thyroid disorders
- Stress
While it may be helpful to have a period tracking app, a simple calendar or note on your phone works just as well to keep track of it all.
What will happen at the appointment?
Sometimes, women are concerned about their visit to an OB-GYN. We know it can be intimidating sometimes, and we totally get it. But always keep in mind that a good evaluation should feel like a conversation, not an interrogation.
Usually, the clinician will ask you about your period pattern, puberty, pregnancy risk, contraception, medications, diet, exercise, stress, weight changes, medical history, and fertility goals.4
Testing may vary from individual to individual, but it often begins with:
- A pregnancy test12
- Blood tests like TSH (thyroid-stimulating hormone), prolactin, FSH (follicle-stimulating hormone), LH (luteinizing hormone), and estradiol4
- A physical examination, based upon your symptoms and concerns2
- A pelvic ultrasound, when your reproductive anatomy, ovaries, or uterine lining are to be evaluated1
- Additional tests only if necessary, such as androgen testing, genetic testing, bone-density testing, hysteroscopy (a medical procedure to look inside the uterus), or pelvic MRI (Magnetic Resonance Imaging)124
Not everyone needs to have a pelvic exam. Your clinician should explain why they are recommending an examination or test and ask for your permission.
How is amenorrhea treated?
There is no universal “period-starting” treatment that may work for everyone. The aim is to manage the underlying cause and maintain your health in the long term.
- Pregnancy, breastfeeding, or menopause may need information and monitoring rather than treatment.1
- Functional hypothalamic amenorrhea may respond to lifestyle changes like reduction of training intensity, stress support, adequate nutrition, and treatment of an eating disorder, if present.619
- For PMOS, lifestyle changes, hormonal contraception, insulin-sensitizing and androgen-blocking medications, metabolic screening, and fertility treatment may be part of the care provided.10
- Thyroid disorders and high prolactin are treated based on the underlying causes.1213
- POI (Premature Ovarian Insufficiency) usually needs lifestyle changes, hormone replacement, and calcium and vitamin D supplements. IVF may be considered when pregnancy is desired.14
- If uterine scarring (Asherman’s syndrome) or an outflow blockage is present, a procedure or surgery may be necessary.415
- The discussion of fertility support can be considered at any time whenever pregnancy is desired.
Never begin hormones or “period remedies” from social media without an assessment. Creating a bleed doesn’t necessarily mean you are fixing what caused your cycle to stop. Always visit your healthcare provider for your concerns!
When to see a doctor?
Arrange a medical assessment if:
- You have never had your first period by the age of 153
- You have never had your first period within 3 years after breast development3
- By age 13, you don’t have any breast development3
- You have not had a period for 3 months and cycles were regular previously2
- You have not had a period for 6 months or more, and cycles were irregular previously2
- Your missed periods are accompanied by pelvic pain, hot flashes, nipple discharge, headaches, vision changes, or new facial hair4
You may also schedule an appointment earlier if you are concerned. We understand how frustrating missed periods can be, so no need to wait until something becomes severe to deserve reassurance.
A reliable source to ask a general women’s health question: In the United States, the Office on Women’s Health Helpline is 800-994-9662. It’s an information service, not an emergency number.20
A reliable source to ask questions about eating disorders: In the United States, the National Alliance for Eating Disorders Helpline is +1-866-662-1235.21
When to seek emergency care:
- In case of a positive pregnancy test, if you experience sudden and severe abdominal or pelvic pain, shoulder pain, heavy bleeding, weakness, dizziness, or fainting. This is suggestive of a ruptured ectopic pregnancy and requires immediate emergency services.
Frequently asked questions
Usually no, you don’t need to panic. But it is still something worth paying attention to! Your cycle relies on a very well-organized connection among your brain, pituitary gland, thyroid, ovaries, uterus, and your vagina. But hormones, calorie intake, stress, intense training, illness, certain medications, and reproductive structures can disrupt this linkage.
For secondary amenorrhea, pregnancy is possible in most cases with appropriate treatment of the underlying cause. However, some women may need fertility treatment.
Yes, particularly in cases where emotional stress coincides with under-eating, weight changes, physical stresses, or excessive exercise. However, stress should not be considered until other medical factors, such as pregnancy, are ruled out.
Not necessarily. Some hormonal methods may decrease or eliminate withdrawal bleeding. If the change is unexpected, if pregnancy is possible, or if you have concerning symptoms, let your clinician know.
Yes, often they do come back. But the time frame may vary according to the cause. Recovery can include treatment for a hormonal disorder, increasing energy availability, adjusting the dosage of a medication, or addressing a structural problem.
No, it doesn’t necessarily mean you are infertile or have some sort of infertility. However, it can lower the chances of pregnancy by making ovulation infrequent, but it will not necessarily prevent it from happening entirely. If your goal is to conceive, visit your healthcare specialist.
Yes. Ovulation occurs before menstruation, so it is possible to become pregnant before you get your periods back. Use contraception when pregnancy is not desired.
At times, the diagnosis may become clearer over time. For example, functional hypothalamic amenorrhea is only diagnosed after other potential causes have been ruled out. Continue to monitor your symptoms and inquire with the clinician about a follow-up plan.
No. Stress, nutrition, exercise, or weight loss or gain may affect your period, but this does not mean you caused the problem. Many genetic, hormonal, anatomical, and medical factors that may lead to amenorrhea are beyond your control.
Last medically reviewed on
References
Our commitment to accuracy is paramount; we use high-quality sources, including peer-reviewed studies, to support the facts in our articles. Learn more about our Editorial Process.
- Cleveland Clinic. (2023). Amenorrhea & Secondary Amenorrhea: Diagnosis, Tests, Management and Treatment. my.clevelandclinic.org
- Practice Committee of the American Society for Reproductive Medicine. (2024). Current evaluation of amenorrhea: A committee opinion. Fertility and Sterility, 122(1), S0015–0282(24)00082-7. doi.org
- Period problems | office on women’s health. (2015). In OASH | Office on Women’s Health. womenshealth.gov
- Nawaz, G., & Rogol, A. D. (2024). Amenorrhea. StatPearls Publishing. ncbi.nlm.nih.gov
- American College of Obstetricians and Gynecologists. (2020). Ectopic pregnancy. acog.org
- Cleveland Clinic. (2022b). Hypothalamic amenorrhea: Causes, symptoms & treatment. In Cleveland Clinic. my.clevelandclinic.org
- The healthy female athlete. ACOG acog.org
- Can stress cause you to skip a period?. In Cleveland Clinic. health.clevelandclinic.org
- Buck, E., McNally, L., & Jenkins, S. M. (2023). Menstrual suppression. In PubMed. StatPearls Publishing. ncbi.nlm.nih.gov
- Cleveland Clinic. (2023). Polycystic ovary syndrome (PCOS). my.clevelandclinic.org
- Polycystic ovary syndrome: MedlinePlus medical encyclopedia. (2016). In Medlineplus.gov. medlineplus.gov
- Office On Women’s Health. (2020). Thyroid disease | office on women’s health. In OASH | Office on Women’s Health. womenshealth.gov
- Hyperprolactinemia (high prolactin levels). (2023). reproductivefacts.org
- Medline Plus. (2019). Primary ovarian insufficiency. In Medlineplus.gov. National Library of Medicine. medlineplus.gov
- Asherman’s syndrome, adhesions. In Cleveland Clinic. my.clevelandclinic.org
- Mayer-rokitansky-küster-hauser syndrome: MedlinePlus genetics. In medlineplus.gov. medlineplus.gov
- Cleveland Clinic. (2023). Turner syndrome: Causes, signs, diagnosis & treatment. my.clevelandclinic.org
- Pregnancy tests | office on women’s health. (2025). In OASH | Office on Women’s Health. womenshealth.gov
- What are the common treatments for menstrual irregularities? nichd.nih.gov
- Office on women’s health. (2026). OASH | Office on Women’s Health. Contact us. womenshealth.gov
- National Alliance for eating Disorders. (2018). National Alliance for Eating Disorders. Contact us. allianceforeatingdisorders.com
Update history
Our team monitors the health and wellness space to keep articles current.
Current version (August 7, 2026) — Written by Dr. Maham Shahid, MBBS. Medically reviewed by Dr. Sadaf Iftikhar, MBBS, FCPS.
August 17, 2023 — Medically reviewed by Dr. Sadaf Iftikhar, MBBS, FCPS. Written by Dr. Sara Zafar, MBBS.
