Implantation Bleeding: Light Spotting 10–14 Days Post-Ovulation, But Rule Out Other Causes

Implantation bleeding occurs when the blastocyst attaches to the endometrial lining (6–12 days post-ovulation, typically day 9).

• Appearance: Light pink or brown spotting; few drops to light staining.
• Duration: Hours to 1–2 days (not heavy flow).
• Timing: Before expected period; often mistaken for early menses.

Differential Diagnosis

• Ovulation spotting (mid-cycle)
• Hormonal fluctuation / breakthrough bleeding
• Cervical irritation (post-coital, exam)
• Early pregnancy loss (chemical pregnancy)
• Ectopic pregnancy (often with pain)
• Infection (cervicitis, STI)

Action: If bleeding is heavy, bright red, clotted, painful, or accompanied by dizziness/shoulder pain → seek urgent care. Otherwise, test at 14 DPO or missed period.