Hi there - thanks for the link Whatsupwiththis. Have had a look and then delved a bit deeper...the title is not quite what the researchh is saying. As Maryjane says - the research refers to vaginal vs non vaginal births not childless women vs mothers. Here is the research but I can't find the full paper just the abstract here:
https://www.ncbi.nlm.nih.gov/pubmed/28440666However unless there is other research, that was an observational study of approx 125 women matched I think for mean (?) age, age at menarche, and age at menopause. I would want to have a look at the full study and data. However the pH of the vagina was one of the measures as well as perception of symptoms and maturation index amongst other measures.
As always the data show trends and statistical signficance and even if the association is shown it would not follow that ALL such women would get VA. it would only be a percentage. Also the data did not include a similar sized/matched group of women who had never had children ie not been pregnant which would have given a fuller picture I would suggest?
Hurdity x