Oh, "Quality of Life" is one of those medical terms that mean "how much does it suck to be you" and as far as I can tell, in women with gestational diabetes the idea that running 'em around for all this testing might make their lives difficult and maybe even not be worth the stress level hasn't even been considered. Heck, the idea that the misery of induction, NICU, etc. might at all weigh against possibility of shoulder dystochia doesn't show up in the literature. (As far as I can tell, they'd really like to transplant every baby whose mother has GDM into an automatic womb device they could control completely.)