Feta cheese is safe to eat during pregnancy only if it is made from pasteurized milk. Unpasteurized feta cheese poses a risk of contamination with harmful bacteria called Listeria monocytogenes, which can cause serious infections, miscarriage, premature labor, or developmental problems in the unborn baby. Most commercially available feta cheeses in stores are pasteurized, but it is crucial to check the label to ensure this. If the feta is pasteurized, it can be consumed safely and provides beneficial nutrients like calcium and protein during pregnancy. However, if the feta is unpasteurized or if the label is unclear, it is best to avoid it to minimize any risk to the baby.