Polymers such as polyurethane, polysulfide rubber and silicone are not harmful substances, but isocyanate substances (TDI, MDI) or phenolic substances may remain in polyurethane raw rubber, which is harmful to health. Although data on the effects of these substances on infants are not yet available, it is necessary to avoid contact with various organic chemicals as much as possible before pregnancy.
I suggest you leave six months in advance.
This is the answer on the second floor!
If you are married but have no children, it is recommended not to engage in this industry for a long time!