Teratogens may be defined as any chemical or physical agent that might cause mutations in the fetus. Teratogen is harmful for both the mother and the fetus.
Teratogen must be avoided during the pregnancy. As this effect the embryonic development and might cause the abnormal growth and development of a child. The child can born with missing eyes, ears or other body parts.
Answer: Talk to your doctor or talk to a professional dietitian.
BUT I recommend you talk to your doctor because they'll know your situation and they can help you out better. Not only can they give you suggestions but they'll know the situation your in.