the women who 'birthed' the boomers, were also a lot more 'hardy', cleaner air, very little electronics, more manual labour, outdoor activity etc... i bet that

the women who 'birthed' the boomers, were also a lot more 'hardy', cleaner air, very little electronics, more manual labour, outdoor activity etc... i bet that generation of mothers gave their infants good gut bacteria that set them up for success.... nowadays our best bet is probably to target a poop transfer surgery.