🩸 Continuous Birth-Control Period-Suppression Simulator

Cyclic 21/7 Dosing and the Withdrawal Bleed

Placebo week triggers a scheduled hormone drop and bleed.

• 21: Active pill days (per standard pack)
• 7: Placebo days (hormone-free interval)
• ~13: Bleeds per year (cyclic regimen)
• Withdrawal: Bleed type (not a true period)

Why the classic pack causes monthly bleeding

Placeholder: hormone withdrawal during placebo days sheds the lining.

Continuous Dosing and Flat Hormone Levels

Daily active pills keep circulating hormone levels steady.

• 365: Active pill days (continuous regimen)
• 0: Placebo days (no scheduled break)
• Low: Hormone variability (flat serum profile)
• Extended-cycle: Common brands (e.g. 84/7 or 365-day)

How continuous dosing flattens the hormone curve

Placeholder: uninterrupted dosing avoids the cyclic hormone dip.

Removing the Hormone-Free Interval

Skipping placebo days prevents the drop that triggers bleeding.

• 0 days: HFI length (vs 7 in cyclic use)
• Sustained: Ovulation suppression (no rebound window)
• Minimal: Follicular activity (reduced escape risk)
• Higher: Adherence benefit (fewer missed-pill risks)

Clinical rationale for eliminating the pill-free week

Placeholder: the 7-day gap was historical, not medically required.

Endometrial Suppression Under Continuous Use

Lining stays thin and inactive without cyclic buildup and shed.

• Thin: Endometrial thickness (atrophic pattern)
• ~70-80%: Amenorrhea by month 12 (approximate placeholder)
• Reduced: Lining turnover (less proliferation)
• Full: Reversibility (after stopping)

Why suppression is considered safe long-term

Placeholder: thin quiescent lining does not require monthly shedding.

Managing Breakthrough Bleeding on Continuous Regimens

Unscheduled spotting is common early and typically declines.

• Months 1-3: Peak spotting window (placeholder estimate)
• Marked: Decline by month 6 (placeholder estimate)
• Short break: Common fix (3-4 day pause if needed)
• Minority: Discontinuation cause (bleeding-related)

Practical strategies for breakthrough bleeding

Placeholder: brief pill-free pauses can resolve persistent spotting.

Placeholder: consult a clinician before adjusting any regimen.