Amenorrhea: Why Have My Periods Stopped, and What Should I Do?

Quick Answer

Amenorrhea means your periods have stopped or never started. It is a symptom, not a disease. Doctors call it secondary amenorrhea if you had periods before and have now missed three or more in a row, and primary amenorrhea if you have not started periods by age 15. Pregnancy is the single most common reason. The rest need a doctor to find the cause.

Key Takeaways

• Rule out pregnancy first. It is the most common cause of suddenly stopped periods, even if you feel no symptoms and even if you use contraception.

• Three missed cycles is the usual doctor trigger. One late period is normal. Three in a row is worth a consultation.

• The cause decides the treatment. PCOS, thyroid problems, high prolactin, stress or weight loss, early ovarian insufficiency and uterine scarring are all treated very differently.

• Some causes are more common in India, including genital tuberculosis leading to uterine scarring, and periods stopping after unsupervised use of over-the-counter period-inducing tablets.

• Do not self-treat with period tablets. Taking hormone tablets to "bring on" a period without first ruling out pregnancy is unsafe and can delay a real diagnosis.

What Does Amenorrhea Actually Mean?

Amenorrhea is the medical word for the absence of menstrual periods. It describes what is happening, not why it is happening. Think of it the way you would think of fever: it tells your doctor something is off, and the job is to find out what.

Your period arrives at the end of a chain of signals. Your brain (hypothalamus and pituitary) signals your ovaries, your ovaries make hormones, those hormones build and then shed the uterine lining. A break anywhere along that chain, from the brain to the vagina, can stop a period. That is why the list of causes is long and why the tests your doctor orders are trying to work out which link in the chain broke.

Primary vs Secondary Amenorrhea: What Is the Difference?

Important for Indian families: primary amenorrhea in a teenager is often dismissed as "it will come on its own" or blamed on being thin. A girl who has not started periods by 15, or who has not shown any breast development by 13, should be examined. Some causes are structural and completely correctable, but only if someone looks.

When Is a Missed Period Actually Amenorrhea?

One skipped or very late period is not amenorrhea. Cycles shift with travel, illness, exam stress, a new job, a viral fever or a few kilos of weight change. Here is the practical timeline.

What Are the Symptoms of Amenorrhea?

The absence of periods is itself the main symptom. What matters far more clinically are the symptoms that come with it, because those point to the cause. Use this table to work out what to flag at your appointment.

What Causes Amenorrhea?

Causes fall into five groups. Grouping them this way mirrors how a gynaecologist actually thinks, and it explains why two women with the same missing period get completely different prescriptions.

1. Normal, expected causes (no treatment needed)

• Pregnancy. The most common cause worldwide and the first thing every doctor rules out.

• Breastfeeding. Exclusive breastfeeding suppresses ovulation for many women. This is the basis of the lactational amenorrhea method of postpartum contraception.

• Menopause. Natural after roughly age 45 to 55.

• The first 1 to 2 years after menarche. Young cycles are often irregular while the hormone axis matures.

• Some contraceptives. Hormonal IUDs, implants, the injectable (DMPA) and continuous pill use can stop bleeding by design. This is expected, not harmful.

2. Hormonal and brain-axis causes

• Polycystic ovary syndrome (PCOS). The most frequent pathological cause of stopped periods in reproductive-age women.

• Thyroid disorders. Both underactive and overactive thyroid disrupt cycles. A simple TSH test catches this.

• High prolactin (hyperprolactinaemia). From a benign pituitary adenoma, or from medicines such as certain antipsychotics, antiemetics and some antidepressants.

• Functional hypothalamic amenorrhea. The brain reduces reproductive signalling when it reads the body as under-resourced: rapid weight loss, low energy availability, heavy training load, chronic stress, or restrictive eating. It can occur at a perfectly normal BMI.

3. Ovarian causes

• Primary ovarian insufficiency (POI). Ovarian function declines before age 40. Not the same as early menopause in every case, and it needs long-term management for bone and heart health.

• Chemotherapy or pelvic radiotherapy.

• Surgical removal of both ovaries.

4. Uterine and outflow-tract causes

• Asherman's syndrome. Scar tissue inside the uterus, typically after a D&C, retained-products procedure, postpartum curettage, or infection.

• Genital tuberculosis. An important cause in India and other high-TB-burden countries. It can damage the endometrium and tubes, causing amenorrhea and infertility.

• Cervical stenosis. Narrowing of the cervical canal.

• Congenital differences. Müllerian agenesis (MRKH), transverse vaginal septum, imperforate hymen. These typically present as primary amenorrhea.

5. Medication, illness and lifestyle

• Certain psychiatric medicines, chemotherapy, long-term steroids

• Poorly controlled diabetes, coeliac disease, chronic kidney or liver disease

• Recent COVID or severe illness causing a temporary cycle disruption

• Major emotional stress, bereavement, migration or shift work

Which Causes of Amenorrhea Are More Common in India?

This is the part most global parenting sites skip, and it genuinely changes what a woman in India should mention at her appointment.

1. Genital tuberculosis. India carries a large share of the global TB burden. Genital TB is frequently silent, and stopped periods plus difficulty conceiving is sometimes the first and only sign. If you have a personal or close household history of TB, say so at your first appointment. It directs testing toward endometrial sampling and imaging rather than just hormones. [Prevalence figure to be added after verification against ICMR or NTEP sources.]

2. Undernutrition and low energy availability. India has high rates of thin BMI and anaemia among women of reproductive age (NFHS-5 reported anaemia in roughly 57 percent of women aged 15 to 49 [verify before publishing]). Anaemia itself does not stop periods, but the underlying pattern of low intake, restrictive vegetarian diets lacking iron, B12 and adequate calories, and heavy unpaid physical work often travels with the low energy availability that does.

3. Unsupervised over-the-counter period tablets. Progestogen tablets sold to "bring on" or "postpone" a period are widely available in India without a prescription. Taking them repeatedly without a diagnosis does two harmful things: it masks the underlying cause for months, and it risks being taken during an undiagnosed pregnancy. If you have used these, tell your doctor exactly what and for how long.

4. Post-procedure uterine scarring. Rates of D&C and surgical management after miscarriage or MTP remain significant, and Asherman's syndrome is under-recognised as a cause of amenorrhea after such a procedure.

5. Delay in presenting with primary amenorrhea. Social hesitation around discussing a teenager's periods often delays a first consultation past age 16 or 17. Structural causes such as an imperforate hymen are simple to correct but need someone to examine.

6. Thyroid disorders and PCOS. Both are commonly reported in Indian women, with PCOS prevalence estimates varying widely across studies depending on diagnostic criteria and region [verify range against ICMR and peer-reviewed Indian cohort data before publishing]. See Mylo's guide on PCOS and irregular periods.

Is Amenorrhea a Sign of Pregnancy?

A stopped period is often the very first sign of pregnancy, and pregnancy must be excluded before anything else is investigated. But amenorrhea alone does not confirm pregnancy, and pregnancy is not the only explanation.

Test correctly:

• Use first-morning urine, when hCG is most concentrated

• Test at least one day after your missed period, ideally a week after

• If the first test is negative but your period still does not arrive, repeat after 5 to 7 days

• If you have irregular cycles, you may not know when a period was actually "missed". A blood beta-hCG test is more reliable here. See how to date a pregnancy with irregular periods

A negative test with no period for three months is not reassurance. It is a reason to see a doctor.

Is It Normal Not To Get Periods After Delivery?

Yes, and this is one of the most common reasons Mylo readers search for this topic.

• If you are not breastfeeding, periods usually return roughly 6 to 12 weeks after delivery.

• If you are exclusively breastfeeding, periods can stay away for many months. Some women do not bleed for the entire first year.

• Ovulation returns before your first period. This is the part that catches people out. You can conceive again before you ever see a period.

Lactational amenorrhea works as contraception only under strict conditions: the baby is under 6 months, breastfeeding is exclusive and frequent including at night, and no period has returned. If any one of those stops being true, it stops being reliable. Read the full method and its failure rate in Mylo's guide to the lactational amenorrhea method.

See a doctor if: you are not breastfeeding and have no period 3 months after delivery, or if you had heavy postpartum bleeding requiring a procedure and periods have not returned.

How Do Doctors Diagnose Amenorrhea?

Diagnosis is a sequence, not one test. Knowing the sequence helps you avoid paying for tests you do not need yet.

Step 1: Pregnancy test. Always first. Urine or serum beta-hCG.

Step 2: History and examination. Your doctor will ask about weight change, exercise, stress, medicines, contraception, past pregnancies and procedures, family history of early menopause, and TB exposure. Be specific. Approximate answers produce approximate diagnoses.

Step 3: First-line blood tests.

Step 4: Pelvic ultrasound. Confirms the uterus and ovaries are present and structurally normal, checks endometrial thickness, and looks for the polycystic ovarian morphology used in PCOS criteria.

Step 5: Targeted second-line tests, depending on results.

• MRI pituitary if prolactin is significantly raised

• Karyotype for primary amenorrhea, or POI under age 30

• Hysteroscopy or saline sonography if uterine scarring is suspected

• Endometrial sampling or TB testing if genital TB is a possibility

• AMH for ovarian reserve, in the fertility context

• Bone density (DEXA) if you have had low oestrogen for a prolonged period

Your doctor may also use a progesterone challenge (a short course of progestogen to see whether bleeding follows) to judge your oestrogen status, although modern practice relies more on direct hormone measurement.

How Is Amenorrhea Treated?

There is no single treatment for amenorrhea, because amenorrhea is not a single condition. Treatment targets the cause.

One line worth repeating: a monthly bleed produced by a tablet is not the same as a healthy, ovulatory cycle. Always ask your doctor which one you are getting and why.

Does Amenorrhea Affect Fertility?

Usually yes, while it lasts, because no period generally means no ovulation, and no ovulation means no egg to fertilise. But that is not the same as permanent infertility.

• Highly treatable for fertility: thyroid disorders, high prolactin, functional hypothalamic amenorrhea, many PCOS cases

• Needs specialist input: primary ovarian insufficiency, significant Asherman's syndrome, genital TB with endometrial damage

• Completely correctable: most outflow obstructions

If you are trying to conceive and have not had a period for three months, do not wait a year before seeking help. The usual "try for 12 months first" advice assumes you are ovulating. If you are not menstruating, that assumption does not apply.

Why Does Long-Term Amenorrhea Matter Even If I Am Not Trying To Conceive?

This is the reason doctors do not simply say "no period, no problem."

Bone health. Oestrogen protects bone. Prolonged low oestrogen, especially in the late teens and twenties when peak bone mass is being built, is linked to reduced bone density and higher fracture risk later. This is a particular concern in athletes, dancers and anyone with restrictive eating.

Endometrial health. In PCOS, the pattern is different. Oestrogen is present but unopposed by progesterone because ovulation is not happening, so the uterine lining can thicken over time. This is why doctors prescribe cyclical progestogens even in women not seeking pregnancy.

Cardiovascular and metabolic health. Early loss of ovarian function is associated with cardiovascular risk, which is why hormone therapy in primary ovarian insufficiency is usually recommended until the average age of natural menopause.

Mental health. Stopped periods often carry real anxiety about fertility, identity and family expectation. That is a legitimate reason to seek help, not a reason to be told you are overthinking it.

What Can I Do At Home While I Wait For My Appointment?

These steps support the process. None of them replaces a diagnosis.

Your pre-appointment checklist:

• Take a home pregnancy test with first-morning urine

• Write down the date of your last period, even if approximate

• List every medicine and supplement you take, including ayurvedic and over-the-counter period tablets

• Note any weight change over the last 6 to 12 months, in kilograms

• Note your current exercise routine honestly, including hours per week

• Record associated symptoms: nipple discharge, headaches, vision changes, hair growth, acne, hot flushes, cold intolerance

• List past pregnancies, miscarriages, MTPs, D&Cs and any uterine surgery

• Note family history of early menopause, thyroid disease or PCOS

• Note any personal or household TB history

• Carry any previous ultrasound or blood reports

Reasonable things to do meanwhile:

• Eat enough. If you have cut calories or skipped meals, stop doing that.

• If you are training hard, reduce intensity until you are reviewed.

• Prioritise sleep and address acute stress where you can.

• Ensure adequate calcium and vitamin D intake, which matters for bone health regardless of cause.

Things not to do:

• Do not take period-inducing tablets without a prescription

• Do not start high-dose herbal or hormonal supplements marketed for "period regulation" without telling your doctor

• Do not assume a negative pregnancy test means nothing is wrong

• Do not wait a full year to "see if it settles"

Mylo Parents Asked

"I stopped my birth control pills 2 months back and still no period. Is this normal?"
Often yes. Cycles usually restart within about 3 months of stopping combined pills. The injectable (DMPA) is different and can delay the return of periods for 6 to 12 months or longer after the last dose. If you are past 3 months off the pill with no bleed, take a pregnancy test and then see a doctor rather than waiting it out.

"My daughter is 15 and has not got her period yet, but her friends all have. Should I worry?"
Fifteen is the point at which it is worth getting checked, not the point at which something is definitely wrong. If she has breast development and pubic hair, this is often constitutional delay and family history matters, so ask when you and her aunts started. But get her seen, because some causes are structural and easy to fix. If she has monthly cramping pain with no bleeding, go sooner.

"I lost 9 kg for my wedding and my periods stopped. Will they come back on their own?"
Frequently yes, once you restore adequate intake and reduce exercise load, though it can take several months. This pattern is typical of functional hypothalamic amenorrhea. The important thing is not to let it run for a year or more untreated, because prolonged low oestrogen affects bone. Ask your doctor about a dietitian referral and about bone density if this has been going on beyond 6 to 12 months.

"My baby is 8 months old, I am still breastfeeding and my periods have not returned. Do I need contraception?"
Yes. Lactational amenorrhea is only a reliable contraceptive method in the first 6 months, with exclusive and frequent feeding, and no period yet. At 8 months, with solids likely started, those conditions no longer hold. Ovulation returns before the first period, so conception is possible before you ever bleed. Discuss a breastfeeding-compatible method with your doctor.

"I had a D&C after a miscarriage last year and my periods are very light, sometimes absent. Is that connected?"
It can be. Scar tissue inside the uterus (Asherman's syndrome) is a recognised complication after uterine procedures and typically presents exactly like this, with lighter or absent periods afterwards. Tell your gynaecologist about the procedure explicitly. Assessment usually involves ultrasound and often hysteroscopy, and adhesions can be treated.

"My reports are all normal but I still have no periods. What now?"
Normal first-line results narrow things down rather than ending the search. It commonly points toward functional hypothalamic amenorrhea, which is a diagnosis of exclusion and is not visible on routine blood tests. It can also mean the cause is uterine rather than hormonal. Ask your doctor directly: "If my hormones are normal, are we looking at the uterus or at an energy or stress cause?"

"Is it safe to take tablets from the chemist to bring my period back?"
No, not without a prescription and not without a pregnancy test first. Those tablets can cause a withdrawal bleed that looks reassuring while the actual cause goes undiagnosed for months. They also carry real risk if taken during an unrecognised pregnancy. A period that comes because of a tablet tells your doctor almost nothing about why your cycle stopped.

"Can PCOS cause periods to stop completely, not just be irregular?"
Yes. PCOS exists on a spectrum, from slightly long cycles through to months with no bleeding at all. Complete absence of periods in PCOS still needs management even if you are not planning a pregnancy, because the lining of the uterus needs to shed periodically. See Mylo's guides on PCOS and irregular periods and oligomenorrhea.

When To Seek Professional Help

Book a gynaecologist appointment if:

• You have missed three or more consecutive periods

• You are 15 or older and have never had a period

• You are 13 or older with no signs of puberty at all

• You are not breastfeeding and have had no period 3 months after delivery

• Your periods became much lighter or stopped after a uterine procedure

• You are trying to conceive and are not menstruating

Seek medical care promptly, within days, if you have:

• Headaches with changes in vision, especially loss of side vision

• Milky nipple discharge when you are not breastfeeding

• Hot flushes, night sweats or vaginal dryness and you are under 40

• Rapid development of facial hair, a deepening voice or noticeable muscle bulk

• Severe monthly pelvic pain with no bleeding, in a teenager who has never menstruated

• Significant unintentional weight loss, or if you are restricting food and exercising compulsively

This article is for information only. It does not diagnose, and it does not replace an in-person consultation with a qualified doctor who can examine you and see your reports.

Bottom Line

Amenorrhea is a signal, not a diagnosis. Rule out pregnancy first, then give it three missed cycles before you treat it as a problem worth investigating, and then actually investigate it rather than reaching for a tablet to force a bleed. Most causes, from thyroid disorders to PCOS to stress and weight-related amenorrhea, respond well once they are correctly identified. The women who do worst are the ones who wait a year or take chemist-bought hormones instead of getting tested.