And when preparing pork, beef, or lamb at home, cook it to medium or medium-well, says Dr. Ricciotti. These meats may be infected with toxoplasma, a parasite
that causes an infection that, although relatively rare, can cause stillbirth or serious health problems.
You probably already know that mercury, which is present in many fish, is dangerous for your baby. "Mercury is a neurotoxin that impairs fetal brain development," says Dr. Ricciotti.