Get this: depending on the cyst she might be halfway there. An ovarian cyst grows in different ways. The PCOS ones are small and numerous like bubble packaging. And right now I can't remember the medical terms, but an ovarian cyst can grow on the outside of the ovary or inside, kinda like an egg yolk, which ends up destroying the ovary. In addition, a cyst rupturing can cut off blood to the ovary, killing it.  So this fat greasetard might have just nuked one of her ovaries. The other will pick up the slack, but being fat + having endometriosis it'll be even harder to get pregnant. And that's assuming she gets regular examinations, and not let this go to the point another cyst forms and grows to the point of rupturing. In which case she'll lose her other ovary, and any chance of reproduction.