I'd love a link to where you read this, I've heard it time and again and I have seen zero data to back it up. There is one form of hypothyroid that is correlated with PCOS and this has led some people to claim that hypo sways blue, but it's a false connection because PCOS sways blue and PCOS people are also more likely to have this form of hypothyroidism.
It is GREAT news that they found this and are treating it because it's one of the main causes of later miscarriages. I know many, many gals with hypo who have daughters. I do not believe it to sway at all.