hi,
thanks for choosing hcm,
there is extermely no harm in taking iron,
folic acid and calcium through out pregnancy
you never need to worry about that
the amount of blood required for mother&child through out pregnancy as well as post pregnancy needs to be replenished by the iron tablets she takes ,this is recommended in all pregnant women to ensure healthy pregnancy and delivery
coming to folic acid,it helps in avoiding any brain defects and neural tube defects of forming fetus
any kind of medication including what you mentioned can be given only when your doctor agrees to it
educate your wife regarding her diet and the benefits of taking good diet to deliver a healthy baby
encourage her to take good food,rather than depending on supplements
hope i answered your queries
feel free to contact me for further queries
thank you