Most vitamins and minerals are generally considered to be safe in pregnancy and breastfeeding, with caution around going to too high a dose with particular vitamins such as A (retinol), C and E during pregnancy.
You may want to check with a registered nutritionist in terms of specific dosages and if you're taking other multis you'll want to adjust accordingly.
Herbs and botanicals are the ones which you would want to exercise more caution around as they can have a powerful action which would not have been tested in pregnancy.
So in the case of our range, this would be the Mountain Blood shilajit and Boswellia Serrata.