Implantation Bleeding vs. Menstrual Period: Key Differences

Distinguishing early pregnancy spotting from a period:

Feature	Implantation Bleeding	Menstrual Period
Timing	6–12 days post-ovulation (near expected period)	Cyclic, every 21–35 days
Color	Light pink / brown	Bright to dark red
Flow	Spotting only (few drops, no clots)	Light to heavy, may clot
Duration	Hours to 1–2 days	3–7 days
Cramping	Mild, brief	Moderate-severe, prolonged
PMS symptoms	Absent/minimal	Common (bloating, mood, breast tenderness)

Action

If uncertain, take a urine hCG test (≥day of missed period) or see a clinician for serum β-hCG and ultrasound.