What is ovulation bleeding? Ovulation bleeding is mild vaginal bleeding that occurs when a woman is ovulating. Under normal circumstances, when a woman ovulates every month, the ovary releases an egg. At this time, the egg moves from the ovary to the fallopian tube and becomes a fertilized egg. During this process, some women will experience a small amount of ovulation bleeding. This type of bleeding is generally mild, lighter in color, short-lived, and does not require special treatment. Causes of ovulation bleeding 1. Ovulation process: Ovulation is when a mature egg is released from the ovary and enters the uterus through the fallopian tube.