when does implantation bleeding happen

Implantation bleeding typically happens about 6 to 14 days after ovulation or conception, most commonly around 10 to 14 days after fertilization when the fertilized egg attaches to the uterine lining. This usually occurs roughly a week before the expected menstrual period. The bleeding is generally light, lasting from a few hours up to three days, and appears as light pink or brown spotting rather than bright red flow. It can be mistaken for an early or light period but differs in duration, color, amount, and associated cramping, which is usually mild or absent in implantation bleeding.