It is generally recommended to avoid consuming animal liver during pregnancy, especially in the first trimester. This is because liver contains high levels of vitamin A, which can be harmful to the developing fetus in excessive amounts. While vitamin A is essential for fetal development, too much of it can lead to birth defects. It is best to consult with your healthcare provider or a registered dietitian for personalized advice on your specific dietary needs during pregnancy. They can provide guidance on alternative sources of nutrients that are safe and beneficial for you and your baby.