In such a fine powdered form, iron can burn, due to its increased surface area. The primary utility of iron filings is in the study and teaching of magnetism and electromagnetic fields. The substance makes impressive demonstrations when sprinkled on a white card placed on top of a permanent magnet, such as a bar magnet.
Here are a few of the specific jobs that are unsafe for pregnant women: 1  Farming. 2  Dry Cleaners. 3  Factory work where there is chemical exposure, too much heavy lifting, or a risk for falls. 4  Print Shops. 5  Craft shops that expose you to drying chemicals, paints, etc.6  Highway worker. 7  Toll Booth operators.8  Construction.obs that are unsafe for pregnant women include: 1  Any job where you are working with hazardous chemicals such as pesticides, toxic cleaning solutions, lead, second hand smoke, etc. 2  Any position where you are doing heavy lifting.
While some medications are not safe during pregnancy, there are nasal sprays that have been FDA approved for sinus congestion. To help pregnant women distinguish between safe nasal sprays that exist and those that are unsafe, there are FDA-assigned pregnancy categories used in the FDAâs Drug Formulary.