Periods Closer Together in Perimenopause: Why It Happens

• In early perimenopause, rising FSH makes the ovary recruit a follicle faster, so the first half of the cycle shortens by 2-4 days. Periods then arrive every 24-26 days instead of every 28-30.
• Shorter cycles come first; skipped and longer cycles come later. This is the normal evolution toward menopause, not a sign your body is broken.
• Cycles consistently under 21 days, very heavy bleeding, bleeding between periods, bleeding after sex, or any bleeding after 12 months without a period all need medical evaluation.
• Iron-deficiency anaemia from heavy bleeding is common in Indian women and badly under-treated. Ask for a ferritin test, not just haemoglobin.
• Effective treatments exist for almost every cause, from tranexamic acid and the hormonal IUD to surgery, so there is rarely a reason to suffer in silence.

A normal menstrual cycle has two halves. The follicular phase runs from day 1 of your period to ovulation, while a follicle in the ovary matures and oestrogen rises. The luteal phase runs from ovulation to your next period, lasting a fairly fixed 12-16 days in almost everyone. Most of the difference in cycle length between women, and from month to month, comes from the follicular phase.

In early perimenopause, the pool of eggs in the ovary shrinks and the remaining follicles respond less readily to the brain's signals. To compensate, the pituitary gland pumps out more follicle-stimulating hormone (FSH). Higher FSH recruits and ripens a follicle earlier than before, so ovulation happens a couple of days sooner. The luteal phase stays the same length, so the whole cycle simply shifts shorter, often by two to four days. That is why periods start coming every 24-26 days instead of every 28-30.

There is a twist worth knowing. Because FSH is high and follicles are driven hard, oestrogen peaks can actually be higher than in your younger years, not lower. This is why many women feel breast tenderness, fluid retention, mood swings or heavier bleeding before they ever feel classic low-oestrogen symptoms like hot flushes. People sometimes call this "oestrogen dominance," but the more accurate idea is a shift in the oestrogen-to-progesterone balance: as ovulation becomes less reliable, progesterone falls while oestrogen stays high. These hormone swings can also drive mood changes during this stage.

This short-cycle phase usually lasts one to several years. Then cycles become unpredictable: you start skipping ovulation, so some months have no progesterone, the lining keeps thickening under oestrogen, and eventually sheds late and often heavily. This is the long-gap, heavy-bleed pattern of late perimenopause. Skipped months become more frequent until you reach 12 months with no period at all, which marks menopause.

Doctors map this journey using the international STRAW+10 staging system, also used by the Indian Menopause Society. The early short-cycle phase corresponds to the early menopausal transition (cycle length varying by 7 days or more from your normal); the skipped-cycle phase is the late transition (gaps of 60 days or more). The whole transition commonly lasts 4-8 years. Recognising the pattern is reassuring in itself: shorter-then-skipped is exactly what is meant to happen. Our guide to perimenopausal period changes walks through the full sequence.

• Cycles a bit shorter than your usual, often by 2-4 days, but still fairly predictable to within a few days.
• Bleeding similar to your old normal in flow and number of days, perhaps slightly heavier some months.
• Maybe a little extra mid-cycle spotting around the more vigorous ovulation.
• No major disruption to daily life, work or sleep.

• Cycles consistently under 21 days — two periods within a calendar month, or gaps of around three weeks repeatedly.
• Heavy menstrual bleeding — soaking a pad or tampon every 1-2 hours, passing clots bigger than a 2-rupee coin, flooding onto clothes or bedsheets, or periods lasting more than 7 days. A menstrual cup makes blood loss easier to gauge.
• Bleeding between periods that is more than light ovulation spotting, especially if it recurs or lasts more than a day or two. Our guide to spotting between periods covers this in detail.
• Bleeding after sex — always worth checking in midlife, as it can point to cervical changes. See bleeding after sex.
• A clear change from your baseline — bleeding that has become much heavier, longer or more frequent than it used to be.
• Any bleeding after 12 months with no period (postmenopausal bleeding) — this always needs prompt evaluation to rule out endometrial cancer, even though most causes turn out to be benign.
• New or worsening pelvic pain, a lump you can feel, or red-flag symptoms like unexplained weight loss or fatigue beyond what blood loss would explain.

Some factors lower the threshold for checking the lining of the womb because they increase the risk of endometrial hyperplasia or cancer: a BMI above 30, never having been pregnant, late menopause or early first period, PCOS, diabetes, tamoxifen use, oestrogen-only hormone therapy in a woman with a uterus, and a family history of endometrial or Lynch-syndrome cancers. If any apply to you, mention them to your doctor.

The practical bottom line: cycles quietly shortening by a few days rarely need urgent tests, but the patterns above do. The cost of an evaluation that turns out reassuring is small; the cost of waiting on a problem that treatment could have solved is not. Indian women often delay because period talk feels private, but early checking finds treatable conditions sooner and provides peace of mind when the cause is harmless.

When checking is warranted, the workup is staged, with each step building on the last. Most evaluations find a treatable cause, and the small minority that find something serious benefit enormously from being caught early.

History and examination. A gynaecologist asks about your cycle, flow, bleeding between periods or after sex, pain, contraception and family history, then examines you for signs of anaemia, checks the thyroid and abdomen, and does a speculum and internal (bimanual) exam to look at the cervix and feel the uterus and ovaries.

Blood tests typically include a full blood count and serum ferritin (iron stores fall before haemoglobin does), thyroid tests (TSH and free T4), and a pregnancy test — essential, because pregnancy and its complications are part of the picture at this age. Prolactin, clotting tests or FSH and oestradiol are added when the history points to them. The panel costs roughly Rs 1,500-3,500 at chains like Thyrocare, Dr Lal PathLabs, SRL, Apollo Diagnostics or 1mg Labs.

Transvaginal ultrasound is the first-line scan. It assesses the uterus (fibroids, adenomyosis), the lining (endometrial thickness) and the ovaries. In a postmenopausal woman not on hormone therapy, a lining of 4 mm or less is reassuring; above that needs further checks. It costs about Rs 500-2,500 privately and is often free at government hospitals. Saline infusion sonography (about Rs 1,500-4,000) adds detail to spot polyps or fibroids bulging into the cavity.

Endometrial biopsy samples the lining when bleeding persists, when there are risk factors, when the lining is thickened, or for any postmenopausal bleeding. The outpatient Pipelle biopsy takes 5-10 minutes with mild cramping and costs around Rs 1,500-4,000. Hysteroscopy (a camera inside the uterus, with or without biopsy) costs more — roughly Rs 15,000-50,000 — and lets the doctor see and treat polyps or small fibroids directly. MRI (about Rs 5,000-15,000) is reserved for complex fibroid mapping or surgical planning.

For concerning bleeding, this is usually completed within two to four weeks. For a typical short-cycle pattern with no red flags, watchful waiting plus basic bloods (haemoglobin, ferritin, TSH and a pregnancy test if relevant) is reasonable.

Structural causes — the PALM part of the framework — are common in midlife and usually visible on a simple scan.

Uterine fibroids (leiomyomas) are benign muscle growths found in roughly 25-40% of women by midlife on ultrasound. Those that bulge into the cavity (submucous) most often cause heavy bleeding; large ones cause pressure, frequent urination or a feeling of fullness. Many cause no symptoms at all. Treatment ranges from the hormonal IUD, tranexamic acid and NSAIDs through to embolisation, myomectomy or hysterectomy, depending on size, symptoms and whether you still want children. Our full guide to uterine fibroids in India, covering types, costs and fertility, walks through the options.

Adenomyosis is when the lining tissue grows into the muscular wall of the uterus. It causes heavy bleeding, increasingly painful periods, and a bulky, tender uterus. It is suspected on ultrasound and confirmed on MRI. The hormonal IUD is often very effective; some women eventually choose hysterectomy. The treatment ladder is set out in our adenomyosis management guide.

Endometrial polyps are benign overgrowths of the lining that protrude into the cavity, common in midlife and a frequent cause of bleeding between periods or after sex. They are removed by hysteroscopic polypectomy and sent for testing; the vast majority are harmless.

Endometrial hyperplasia is an over-thickened lining that, especially when it shows abnormal (atypical) cells, can be a precursor to cancer. Hyperplasia without atypia is usually treated with progestogens and monitoring; with atypia, hysterectomy is often advised. Endometrial cancer is the most common gynaecological cancer in this age group, and its classic warning sign is postmenopausal bleeding. Because bleeding usually appears early, prompt evaluation means it is most often caught when treatment is highly effective — the warning signs every woman past 40 should know are worth reading.

The COEIN causes are non-structural and several are very relevant for Indian women.

Thyroid problems are a leading and easily fixed cause. An underactive thyroid (hypothyroidism), common in Indian midlife women, often produces heavy bleeding, while an overactive thyroid tends to make periods light or absent. This is exactly why TSH and free T4 are routine, and why correcting the thyroid with levothyroxine frequently settles the bleeding.

PCOS often persists into midlife, causing irregular, anovulatory cycles with unpredictable bleeding and a raised risk of a thick lining. Management combines lifestyle measures, cycle regulation and ongoing surveillance.

Bleeding disorders are under-recognised. The most common, von Willebrand disease, causes heavy bleeding from the very first period, easy bruising and a family history; it deserves a clotting workup and haematology input.

Medications matter too: blood thinners, antiplatelet drugs and even some herbal supplements can worsen bleeding, so bring a full list to your appointment.

Hormonal causes include a raised prolactin level (which can cause light or absent periods and milk-like discharge) and the irregular spotting that is normal in the first 3-6 months of a hormonal IUD or progestin contraceptive. Often several factors overlap, which is why a good workup covers both the structural and non-structural lists.

Most women can control heavy bleeding and shortened cycles without surgery. The right choice depends on the cause, whether you still need contraception, and your preference for hormonal or non-hormonal options.

The hormonal IUD (LNG-IUS, e.g. Mirena, ~Rs 8,000-15,000, lasts 5 years) is the gold standard for heavy menstrual bleeding. It releases progestogen locally, cutting blood loss by around 90% over six months, with many women bleeding very little or not at all by a year. It also provides excellent contraception, eases period pain, and protects the womb lining if oestrogen is later added for hot flushes. Expect irregular spotting for the first 3-6 months as it settles. Compare it with the copper coil in our copper IUD vs Mirena guide.

Tranexamic acid (Pause, Trapic, ~Rs 100-300/month) is a non-hormonal tablet taken only during the period that reduces flow by 40-50%. NSAIDs such as mefenamic acid reduce both flow and cramps and can be combined with tranexamic acid.

Oral progestins (cyclical or continuous) protect the lining and can reduce bleeding, while combined hormonal contraception suits younger perimenopausal women without contraindications, offering contraception, cycle control and lighter periods in one. GnRH agonists and the newer GnRH antagonists are powerful options usually reserved for fibroids or as a bridge to surgery, with menopause-like side effects managed by add-back hormones. The full treatment ladder is laid out in our guide to heavy menstrual bleeding.

When tablets and the IUD are not enough, procedures step in: endometrial ablation (destroys the lining; 80-90% improve, not for women wanting children), hysteroscopic removal of polyps or submucous fibroids, uterine artery embolisation or myomectomy for fibroids, and hysterectomy as definitive treatment when other options fail or there is significant disease. In premenopausal women, keeping the ovaries during a hysterectomy preserves natural hormone production and avoids an abrupt menopause. Most women find adequate control well before reaching surgery.

Iron-deficiency anaemia from chronic heavy bleeding is one of the most common and most under-treated consequences of perimenopausal bleeding in India, where iron intake is often low to begin with, especially on a vegetarian diet.

Iron runs down in stages. First, stores fall (low ferritin, normal haemoglobin) — and even at this stage you can feel exhausted. Only later does haemoglobin drop into frank anaemia. Symptoms of low iron include fatigue, breathlessness on exertion, hair shedding, brittle nails, restless legs, headaches, poor concentration and craving non-food items like ice. These are too often dismissed as "just menopause."

The key test is serum ferritin, not haemoglobin alone: below 30 ng/mL signals depletion. This is why every woman with heavy perimenopausal bleeding should have ferritin checked. Our deep dive on iron deficiency in Indian women explains the numbers in full.

Treatment is oral iron for most — modern evidence favours a single morning dose, or even alternate-day dosing, taken with vitamin C and away from tea, coffee, milk and antacids, for better absorption and fewer side effects. Intravenous iron (about Rs 3,000-8,000 per infusion) is used when tablets are not tolerated or repletion needs to be fast. Iron-rich Indian foods help over time: dark leafy greens (palak, methi), pulses (chana, rajma, dal), jaggery, dates and sesame, ideally paired with amla, citrus or capsicum for the vitamin C boost; cooking in an iron kadhai adds a little more.

The crucial point: treat the iron and the bleeding together. Iron alone keeps draining away if the heavy periods continue; treating the periods alone leaves you tired until the iron is restored. Done together, the difference in energy is often dramatic.

Perimenopausal women still ovulate sometimes, so pregnancy — planned or not — must always be on the list when bleeding turns unusual. Guidelines advise continuing contraception for one year after your last period if menopause arrives at 50 or older, and two years if before 50.

The hormonal IUD is again the standout, combining reliable contraception with heavy-bleeding control in one device. Other options include the copper coil (non-hormonal, but tends to increase flow), the progestin-only pill, the injection or implant, combined pills for those without contraindications, barrier methods, and permanent sterilisation. Emergency contraception (levonorgestrel pills such as i-Pill and Unwanted-72) is available over the counter in India. Our guide to contraception in perimenopause compares the choices for this stage.

Two pregnancy complications deserve special caution. Ectopic pregnancy is more common in older women and presents as a missed or odd period, then bleeding and one-sided pain — a positive pregnancy test with abnormal bleeding needs urgent assessment, as our ectopic pregnancy guide explains. Miscarriage is common at this age and its bleeding can be mistaken for a normal perimenopausal period. A pregnancy test and scan settle the question. If you are unsure whether a missed period means pregnancy or perimenopause, can you get pregnant during perimenopause is the place to start.

Who you see depends on your symptoms and where you live. A gynaecologist leads the evaluation; FOGSI and the Indian Menopause Society maintain member directories. Consultations cost roughly Rs 500-1,500 privately and are free or minimal at government hospitals. A family physician can run the first tests and start simple treatment, which matters greatly in smaller towns where gynaecology access is limited. An endocrinologist, haematologist or interventional radiologist is brought in for thyroid, clotting or fibroid-embolisation needs respectively.

A typical journey: week 1, consultation, bloods and a scan booked; week 2, results reviewed and either a medication trial started or a biopsy arranged if there are red flags; weeks 4-6, biopsy or hysteroscopy if needed; month 3 and month 6, review of how treatment is working, escalating only if necessary. This compresses for urgent bleeding and stretches for stable, mild patterns.

Most major Indian health insurance plans cover medically indicated evaluation and treatment, including IUD insertion, hysteroscopy and surgery, usually with pre-authorisation; government hospitals provide essentials free. Online consultations (Practo, Apollo 24/7, Tata 1mg) work well for follow-up and discussing patterns, with in-person visits for examinations and procedures.

Finally, the emotional side is real and often underestimated. The unpredictability, the heaviness, the disruption to work and social life, the worry about why it is happening, and the symbolic weight of approaching menopause all add up. Talking openly with your doctor about both the physical and emotional load is reasonable, and so is asking for mental-health support if it is wearing you down. Bringing your partner into the conversation helps too — our guide to talking to your husband about menopause can make that easier. Period changes — starting with cycles coming closer together — are a normal, well-understood phase, with effective treatment for almost every cause, and good reason to expect this passage to be manageable rather than miserable.

• Harlow SD et al. STRAW+10: Executive summary of the Stages of Reproductive Aging Workshop +10. Menopause / Fertility and Sterility, 2012
• Munro MG et al. FIGO classification system (PALM-COEIN) for causes of abnormal uterine bleeding in nongravid women of reproductive age. International Journal of Gynecology & Obstetrics
• NICE Guideline NG88: Heavy menstrual bleeding: assessment and management. National Institute for Health and Care Excellence (UK)
• ACOG: Perimenopausal Bleeding and Bleeding After Menopause (FAQ / Committee Opinion)
• Faculty of Sexual & Reproductive Healthcare (FSRH): Contraception for Women Aged Over 40 Years
• WHO: Anaemia (fact sheet) and guidance on iron deficiency in women