What does it mean to spot a little bit about 4 days after ovulation?

Hormone fluctuations: Mid-cycle bleeding is generally thought to be normal due to the sudden change in hormone levels that occur with ovulation. But not all mid-cycle bleeding is normal and it could be the sign of some other problem like a polyp or fibroid. A gynecologist can tell you if this is normal or not.

Varies: Many reasons for spotting after ovulation. It can be normal, could come from the cervix, be related to intercourse, occur with implantation (rare), reflect structural abnormalities like a fibroid or polyps, or result from low Progesterone levels (luteal phase defect). Such symptoms should be reviewed with your doctor.