Hold on the NHS did not say that. https://www.nhs.uk/news/2016/07July...dont-help-just-take-vit-D-and-folic-acid.aspx
"Where did the story come from?
This was a report in the Drug and Therapeutics Bulletin, part of the BMJ publishing group. The article on vitamin supplementation in pregnancy does not specifically state its authors, their affiliations, or any sources of funding.
This report received wide media coverage in the UK. All media stories mention the current recommendations for pregnant women, but none discuss the reliability of the study, which appears to be a non-systematic review."
What NHS said was that in WELL NOURISHED (because who really eats all their daily servings) women only need to supplement vitamin d and folic acid. But this study was not properly vetted or trustworthy. Set an alarm. Take your vitamin. I take mine right before I want out the door to go to work. It's not going to do anything major, but let me just say there is a clear developmental difference between my cousins' babies (no prenatal) and my friends' babies (prenatal). Granted lots of other variable but why chance it