Can a small amount of bleeding outside of the menstrual period be a sign of pregnancy?

Patient's question:

No

Doctor's answer:

Not within the ovulation period, it is a safe period and will not lead to pregnancy. Intercourse during menstruation can cause sperm to meet with damaged endometrium and blood cells, or even enter the bloodstream, which may trigger the production of antisperm antibodies, leading to immunological infertility or sterility. It is advisable to avoid intercourse during menstruation.