I took Elevit with Charlotte - but then it was only for the first trimester and then while BF, not the whole pregnancy.
This time round, I started taking Elevit again when I found I was pregnant but was surprised to find they now say you should take it throughout pregnancy and while BF, so will take it as directed. Although having said that, I don't freak if I miss a day.

Charlotte was a surprise, so no option and this one was planned but we weren't actively trying at the time I conceived so wasn't taking anything - honestly though, I wouldn't take anything extra while TTC anyway.