Implantation of a fertilized egg usually occurs about 6 to 10 days after ovulation. On average, implantation happens around 8 to 10 days after ovulation, but it can occur as early as 6 days or as late as 12 days after ovulation. This is the process where the fertilized egg, now called a blastocyst, embeds itself into the lining of the uterus, starting the early stages of pregnancy. The timing can vary from person to person and cycle to cycle, but generally, implantation occurs within this timeframe after ovulation and fertilization.