I'd probably have been one of the many women who died in childbirth, when my first daughter got stuck, not breach but facing the wrong way nonetheless!
And I have a five year old grandson, born fifteen weeks too soon, who is currently obsessed with volcanos, paper aeroplanes and tornados. Without a very good, modern NICU in Burnley, he wouldn't be here.
My not quite two year old great-niece, now rushing around like a mad thing was, just last year, the smallest baby ever to have had a particular procedure, by a brilliant and very daring surgeon, to correct a very severe congenital heart defect. We don't have to go back more than a very few years for her not to have survived infancy.
But I also have ancestors who lived very long lives in pretty basic circumstances, my best example being a several times great-grandmother who was born in 1746, in the Yorkshire Dales and who had the good grace to live until after the 1841 census so that I could know about her!