I have read that babies delivered vaginally acquire their mothers microbiome, whereas Caesarean deliveries do not have the same mechanism. But have not seen any studies showing that Caesarean deliveries have higher incidence of disease due to missing microbiome at birth. Possibly non-vaginal babies microbiome is acquired in the home through natural causes.
This has nothing to do with the OP's daughter who got UC at age 19 or me who got it at age 46. My gene test says Crohn's is a possibility genetically, no mention of UC. No one in my family had IBD but older generations don't always disclose personal data.
Genes are influenced by environmental agents but who knows how that happens or how many years it would take.
Post Edited (imagardener2) : 12/6/2016 3:45:25 AM (GMT-7)