I reckon it’s language at play here? IVF seems to cause OHSS but it isn’t very common, in one study only about 1% of IVF patients get OHSS (Annual incidence of severe ovarian hyperstimulation syndrome | Ugeskriftet.dk). I.e. they are at risk, but only rarely so if that makes sense. I do think that this card could be rewritten to better aid learning. E.g. What is an uncommon ovarian complication of IVF with ovulation induction (hCG therapy)?