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Your husband's exposure to paint fumes would not be expected to produce birth defects. Obviously, the male contribution to pregnancy (in strictly physiologic terms) is his chromosomes. I am not aware that paints are associated with permanent chromosomal damage in male sperm cells.
On the other
handHand or foot spasms
Hand tremor, I would recommend that you avoid excessive exposure to fumes after pregnancy occurs. Some organic solvents may increase the risk of
miscarriage with heavy exposures. At any rate, this gives you a good excuse not to help with the painting chores.