Irregular Periods & Heavy Bleeding
Unpredictable menstrual cycles—periods that come too often, too rarely, or not at all—often accompanied by heavier, longer bleeding than before, signaling the hormonal chaos of perimenopause.
Systems involved
Contributing factors
What It Is
Irregular periods are one of the first and most common signs of perimenopause. Your previously predictable cycle becomes unpredictable:
- Shorter cycles: Period every 21-24 days (instead of 28+)
- Longer cycles: 35-60+ days between periods
- Missed periods: Skipping one or more cycles
- Variable cycles: No pattern—short one month, long the next
Heavy bleeding (menorrhagia) means:
- Soaking through pads/tampons every 1-2 hours
- Bleeding for 7+ days (when you used to bleed 3-5)
- Passing large clots (quarter-size or bigger)
- Flooding or gushing
- Nighttime leaking despite protection
90% of women experience menstrual changes during perimenopause. For many, it's the first sign that "something is different."
Why It Happens
Normal Menstrual Cycle (Pre-Perimenopause)
Follicular phase (days 1-14):
- Estrogen rises as follicles develop
- Uterine lining thickens
Ovulation (day 14):
- Egg is released
- Progesterone production begins
Luteal phase (days 15-28):
- Progesterone dominates
- Stabilizes uterine lining, prepares for pregnancy
- If no pregnancy, estrogen and progesterone drop → period starts
Perimenopause: Hormonal Chaos
Progesterone declines first (before estrogen):
- Ovulation becomes irregular or absent (anovulatory cycles)
- Without progesterone, uterine lining isn't stabilized
- Lining continues to thicken (estrogen dominance)
- When lining finally sheds, bleeding is heavy and prolonged
Estrogen fluctuates wildly:
- Can spike very high (estrogen surges)
- Causes excessive lining buildup
- Then crashes → heavy, irregular bleeding
FSH (follicle-stimulating hormone) increases:
- Brain tries harder to stimulate ovulation
- FSH spikes → estrogen spikes → erratic cycles
Result:
- No predictable pattern
- Cycles can be 20 days or 60 days
- Heavy, light, or absent bleeding
- Flooding, clots, prolonged periods
Why Bleeding Gets Heavier
Estrogen dominance (high estrogen, low progesterone):
- Thicker uterine lining = more tissue to shed
- Lining is unstable without progesterone
- Sheds irregularly, heavily
Anovulatory cycles (no ovulation):
- No progesterone to stabilize lining
- Lining builds up for weeks or months
- Eventually breaks down in heavy, unpredictable bleeding
Common Experiences
Pattern Changes
Shorter cycles:
- Period every 21-25 days
- Feeling like you "just had a period"
- Constant PMS, never feeling good
Longer cycles:
- 35-60+ days between periods
- Uncertainty: "Am I pregnant? In menopause?"
- Relief when period finally comes
Skipped periods:
- Miss one or more cycles
- Then period returns (sometimes with a vengeance)
- Not menopause yet—just erratic ovulation
No pattern:
- 25 days, then 45 days, then 30 days
- Impossible to predict
- Can't plan trips, events, intimacy
Heavy Bleeding Experiences
Flooding:
- Soaking through super tampons in 1-2 hours
- Gushing when standing up
- Accidents, leaks, embarrassment
Clots:
- Large clots (grape, plum, golf ball-size)
- Can be alarming and painful
- Indicator of heavy flow
Prolonged periods:
- Bleeding for 7-10+ days (used to be 3-5)
- Exhausting, disruptive
- "Will this ever stop?"
Nighttime challenges:
- Waking to change protection
- Leaking through overnight pads
- Anxiety about sleeping
Impact on Life
Anemia (iron deficiency from blood loss):
- Fatigue, weakness
- Shortness of breath
- Dizziness, lightheadedness
- Pale skin, cold hands/feet
Disruption:
- Can't plan travel, events, exercise
- Fear of accidents in public
- Avoiding white clothing, intimacy
- Work absences
Emotional toll:
- Frustration, anxiety, loss of control
- "When will this end?"
- Grief over loss of predictability
What Helps
1. Tracking
Track cycles to identify patterns (even if chaotic):
- Period tracking app (Clue, Flo, etc.)
- Note: start date, length, flow heaviness, symptoms
- Helps identify anovulatory cycles, estrogen dominance
- Useful information for your clinician
2. Hormonal Birth Control
Combined oral contraceptives (estrogen + progestin):
- Regulate cycles (predictable withdrawal bleeds)
- Lighten periods
- Prevent ovulation (stops hormonal chaos)
- Safe for most healthy, non-smoking women up to age 50-55
Progestin-only options:
- Progestin-only pill (mini-pill)
- Nexplanon (implant)
- Depo-Provera (injection)
- Lighten or stop periods
- Safe for women who can't take estrogen
Hormonal IUD (Mirena, Kyleena, Liletta, Skyla):
- Most effective for heavy bleeding
- Releases progestin locally in uterus
- Thins uterine lining dramatically
- Periods become very light or stop entirely
- Lasts 3-7 years (depending on brand)
- Can stay in place through menopause
Effectiveness: Hormonal IUD reduces bleeding by 90%+ for most women.
3. Cyclical Progesterone (Non-Contraceptive)
For women who can't or don't want birth control:
Oral micronized progesterone (Prometrium):
- Take days 14-28 of cycle (or last 2 weeks of each month)
- Stabilizes uterine lining
- Prevents excessive buildup
- Reduces heavy bleeding
- Doesn't prevent pregnancy (use backup contraception)
Dosing: Typically 200mg nightly for 12-14 days/month
4. Non-Hormonal Medications
Tranexamic acid (Lysteda):
- Reduces bleeding by 40-50%
- Take during period only (not all month)
- Helps clotting, slows blood loss
- Non-hormonal option
NSAIDs (ibuprofen, naproxen):
- Reduce bleeding by 20-30%
- Also reduce cramping
- Take during period
5. Iron Supplementation
If bleeding is heavy, test for anemia:
- Ferritin (iron storage): should be >70 for optimal energy
- Hemoglobin/Hematocrit: if low, you're anemic
If low, supplement:
- Ferrous sulfate 325mg daily (or as directed)
- Take with vitamin C for absorption
- Avoid taking with calcium, coffee, tea
- May cause constipation (increase fiber, water)
6. Procedures (If Medication Doesn't Work)
Endometrial ablation:
- Destroys uterine lining (so it can't build up and bleed heavily)
- Outpatient procedure
- 80-90% of women have lighter periods or no periods after
- Not reversible: Can't get pregnant after
- Good option for women done with childbearing
Hysterectomy (last resort):
- Surgical removal of uterus
- Permanent solution (no more periods)
- Major surgery, longer recovery
- Consider if other treatments fail and bleeding is severe
7. Lifestyle Support
Manage estrogen dominance:
- Limit alcohol (liver processes estrogen)
- Maintain healthy weight (fat tissue produces estrogen)
- Cruciferous vegetables (broccoli, cauliflower) support estrogen metabolism
- Fiber (helps eliminate excess estrogen)
Stress management:
- Chronic stress worsens hormonal imbalance
- Prioritize sleep, rest, boundaries
When to See a Doctor
Always investigate:
- Bleeding through a pad/tampon every 1-2 hours
- Bleeding lasting 7+ days
- Bleeding after menopause (12+ months without a period)
- Severe pain with periods
- Bleeding between periods or after sex
Why:
- Rule out other causes: fibroids, polyps, endometrial hyperplasia, cancer (rare but possible)
- Diagnose and treat anemia
- Discuss treatment options
What to expect:
- Pelvic exam: Check for structural abnormalities
- Ultrasound: Visualize uterus, ovaries, lining thickness
- Blood tests: Check for anemia, thyroid, hormones
- Endometrial biopsy (if indicated): Sample uterine lining to rule out cancer or hyperplasia
Bleeding Patterns by Phase
Electric Cougar / Early Wild Tide:
- Shorter cycles (21-25 days)
- Heavier periods
- "I just had a period!"
Mid-Wild Tide:
- Erratic cycles (short, long, skipped)
- Very heavy bleeding episodes
- Anovulatory cycles common
Late Wild Tide / Henapause:
- Longer gaps between periods (45-60+ days)
- When period comes, often heavy
- Nearing menopause
The Pause (menopause):
- 12 months without a period = official menopause
- Any bleeding after this requires evaluation (could be benign, but must rule out cancer)
Duration
Irregular periods typically last:
- 4-8 years on average (range: 2-12+ years)
- Begin in early-mid perimenopause
- Continue until menopause (final period)
Heavy bleeding:
- Often peaks in mid-perimenopause (Wild Tide)
- Improves as periods space out (Henapause)
- Ends at menopause
The Emotional Toll
Irregular, heavy periods are:
- Disruptive: Can't plan life, constant vigilance
- Exhausting: Physical and emotional drain
- Invalidating: "It's just a period, deal with it"
- Isolating: Hard to explain the impact
But they're also:
- Normal (for perimenopause)
- Treatable (many effective options)
- Temporary (will end at menopause)
Myths and Misconceptions
Myth: "Irregular periods mean I'm in menopause." Truth: Irregular periods mean you're in perimenopause (the transition). Menopause is 12 months with no period.
Myth: "I can't get pregnant if my periods are irregular." Truth: You CAN still get pregnant during perimenopause. Ovulation is erratic, but possible. Use contraception if you don't want pregnancy.
Myth: "Heavy bleeding is just part of aging; nothing can be done." Truth: Heavy bleeding is treatable. Don't suffer unnecessarily.
Myth: "A period every 3 weeks is normal." Truth: While common in perimenopause, it's worth treating—you don't have to live with constant periods.
The Bottom Line
Irregular periods and heavy bleeding are:
- Common (90% of perimenopausal women)
- Hormonal (progesterone decline, estrogen fluctuations)
- Treatable (hormonal IUD, birth control, progesterone, procedures)
- Temporary (end at menopause)
You don't have to accept flooding, anemia, and unpredictability. Treatment is safe, effective, and life-changing for most women.
Phase impact
Cycles are regular and predictable. Bleeding is consistent (3-7 days, moderate flow).
First signs of change—shorter cycles (21-25 days), heavier periods, longer bleeding.
Peak irregularity. Cycles are erratic (short, long, skipped), very heavy bleeding, flooding, large clots. Most disruptive phase.
Longer gaps between periods (45-60+ days). When period comes, often heavy. Approaching menopause.
12 months without a period = menopause. Periods stop permanently.
No more periods. Any bleeding requires evaluation.
No periods. Uterine lining is thin and inactive.
Typical vs. concerning
Typical: Irregular cycles, heavy bleeding, clots, periods lasting 7-10 days during perimenopause. Concerning: Bleeding soaking through protection every 1-2 hours, bleeding after menopause (12+ months without period), severe pain, bleeding between periods or after sex.
When it makes sense to get medical input
If bleeding is soaking through pads/tampons every 1-2 hours. If periods last 7+ days. If you're experiencing dizziness, fatigue, or other signs of anemia. If bleeding occurs after menopause. To discuss treatment options (birth control, IUD, progesterone). If cycles are severely disrupting your life.