Implantation Bleeding vs. Period: Timing, Characteristics, and Other Early Pregnancy Signs

Implantation bleeding occurs when the blastocyst attaches to the endometrium, ~6-10 days post-ovulation (typically day 20-24 of a 28-day cycle).

Distinguishing Features

Feature	Implantation Bleeding	Menstrual Period
Timing	10-14 days post-ovulation	~14 days post-ovulation
Flow	Spotting only (few drops)	Progressive, heavier
Color	Pink, light brown	Bright to dark red
Duration	Hours to 1-2 days	3-7 days
Clots	Absent	Common
Cramping	Mild, brief	Moderate-severe

Associated Early Signs

Breast tenderness, fatigue, nausea, heightened smell sensitivity, mood changes, frequent urination.

If uncertain, take a home pregnancy test at missed period; serum hCG is definitive.