I started taking them months before ttc & I'm on them now & will stay on them while I breastfeed.
Blackmores preg & breastfeeding gold, was on elevit but it doesn't contain iodine so I switched.
I swear being on them helped me with my cold recently hubby had it and gave it to me, he still has it after 5 weeks, my cold lasted 2 weeks!
Can't hurt to start taking them now.
I also took vitex prior to falling preg this time & it was great for my cycles.