I have a cat that is pregnant this will be her 3rd litter of kittens, but this time its different I noticed that she leaks blood from the vagina. Does this mean that she will lose them or what?

How come she wasn't spayed after the first or even second litter?

She needs to go to a vet, this is not normal.

Leaking blood from the vagina is never normal OR good. How close together were the litters?

Why hasn't she been spayed?

I would make an appointment for her... human's can bleed a little bit during pregnancy and be fine. Im sure a spot of blood as long as nothing else changes is ok(literally a spot).. but if it's any significant amount I would take her in quickly.