"Researchers studied more than 2,000 women with ovarian cancer and a similar-sized control group who were free of disease. Overall, they found a 33% increase in the risk of ovarian cancer with genital talc use. " www.nhs.uk/news/2016/03March/Pages/Talc-and-ovarian-cancer-what-the-most-recent-evidence-shows.aspx
"Background: Multiple studies of ovarian cancer and genital talc use have led only to consensus about possible carcinogenicity. Seeking greater clarity, we examined this association in 2,041 cases with epithelial ovarian cancer and 2,100 age- and-residence-matched controls" from the abstract of the study.
It was a retrospective study, so it was based on women's recollections of their talc use in the past, (so maybe not quite as reliable as a specially set-up trial)
And I can't see any answer to the question "33% more than what?" which could mean that the risk was 4 in 10 instead of 3 in 10 - that would means that it would affect a lot of people - or it could mean 4 in 10,000 instead of 3 in 10,000, which would mean it would affect a few people. Or anything in between or at either side of those levels of risk! It also was not designed to establish cause and effect, just an assocation.
So, yes there does appear to be a higher risk of cancer from using talc on that area of the body.