Iron deficiency anaemia can often be treated better by adding supplements than by giving iron alone.
For example,: by adding vitamin C, adding vitamin B6 for children, Zinc for women; vitamin A may help but be careful with the amount in pregnancy sometimes, extra vitamin B2 , may be helpful in pregnant women.
When I studied medicine often, Iron was given often together with copper for anaemia.
I think this has mostly been forgotten since then, but it may likely often help.
I strongly advise not to give -non-laboratory examined – multivitamins in pregnancy as they may contain heavy metals, especially those containing calcium.
As long as I don’t see an analysis of “prenatal”, used in Israel I would not advise using this.
There are some prenatal supplements that have been extensively tested in the USA and I prefer to use these.