How long does it take for implantation bleeding to occur?

This type of bleeding during pregnancy usually occurs 6 to 12 days after conception--close to the time when the next menstrual cycle is expected. Ask yourself when was the last time you had sex. If more than a month or two has passed, then it's unlikely that what you're seeing is implantation bleeding. read more

However, fertilization must occur for implantation to begin. Sperm can live in the body for 5 days. If fertilization has occurred, the egg will stay within the fallopian tubes for 3 to 4 days instead of just 1 day. read more

Often, this bleeding happens between the 6th and 12th days after the embryo has formed, or somewhere between the 2nd and 7th days before period. It does take some time for the fertilized egg to travel to the uterus and implant itself into the inner lining. That`s why implantation bleeding does not start immediately after the egg-fertilization. read more

When this happens, a small amount of blood can leak into the uterine cavity, causing implantation bleeding. Implantation bleeding does not occur with every woman. Usually only about 30% of women will experience implantation bleeding. You will usually see implantation bleeding 3 to 6 days before your period is due if you are one of the 30%. read more