Implantation Bleeding Duration: What's Normal & When to See a Doctor

Implantation bleeding—light spotting when the embryo attaches to the uterine lining—typically occurs 6–12 days after ovulation (around expected period) and lasts a few hours to 2 days.

Key Characteristics

• Volume: Scant—pink/brown spotting, not a flow.
• Duration: < 48 hours (often < 24 hours).
• Timing: Before expected menses; no clots.
• Associated Symptoms: Mild cramping, breast tenderness, basal body temperature dip.

When to Seek Evaluation

• Bleeding lasts > 3 days.
• Heavy flow (soaking pad/tampon).
• Bright red blood with clots.
• Severe pain (one-sided → ectopic pregnancy concern).
• Positive pregnancy test + any bleeding (rule out miscarriage, subchorionic hematoma).

6 days of bleeding is not typical for implantation. It may represent early menses, hormonal fluctuation, cervical irritation, or pregnancy complication. Consult your OB/GYN for assessment—especially if pregnancy is confirmed or suspected.