Implantation bleeding typically occurs about 6 to 14 days after ovulation or fertilization. More specifically, it usually happens when the fertilized egg attaches to the uterine lining, which can occur around 5 to 12 days after fertilization, often around 10 to 14 days after ovulation. This timing means implantation bleeding often occurs close to when you might expect your menstrual period, which can make it easy to confuse the two. The bleeding is usually light, pink or brown in color, and lasts for a day or two. It is much lighter than a normal period and usually does not require more than a thin pad to catch the blood. Mild cramping may sometimes accompany the bleeding, typically less intense than menstrual cramps. In summary:
- Implantation bleeding occurs roughly 6-14 days after ovulation/fertilization.
- Most commonly around 10 to 14 days after ovulation.
- It results from the fertilized egg attaching to the uterine lining and disrupting blood vessels.
- The bleeding is light and short-lasting, often pink or brown in color.
This bleeding can be one of the first signs of pregnancy but not everyone experiences it.
