There is still so much we don't know about these things but I would start with a teratology information program such as otispregnancy.org whose job it is to be aware of potential exposures in pregnancy and breastfeeding. They link in to national registries for information about effects on the fetus if any are known. There are local organizations as well. In Utah there is the Pregnancy Risk Line - a hotline for information. Perhaps there is a similar program where you live. You may try your local health department or environmental health program, which may be affiliated with the state health department. Look under titles such as teratology services or information.
I'm sorry I can't be more helpful but it seems logical that she should limit her exposure as much as possible and consider getting a good respirator mask as well.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN