Actually I’d want my baby to come out whenever he’s ready. But if you ask, I prefer 40 weeks as my firstborn came out at 40 weeks. Both my babies are pretty big, they’re both 3.1kg at 36 weeks checkup. Haha my firstborn came out 3.7kg via emergency c-sect and I’m hoping for a VBAC this time round. I’m easily tired however, breathless no doubt. Feeling much more pelvic pain than I did previously. But whatever it is, whenever baby is ready, I’ll be ready!
No concrete evidence because it really depends on your body and each baby.