Oysters are slightly cold and salty, which may cause constipation, so don't eat more every day. In addition, some people are allergic to seafood products, so don't eat oysters if you have allergies before. Oysters must be cooked for pregnant women to avoid parasites, viruses, bacteria and so on. In a word, it is completely possible for pregnant women to eat a proper amount of oysters at the beginning of pregnancy, for example, at most 2-3 oysters a day, and not to eat them every day.
The most important thing for pregnant women in the early stage of pregnancy is to maintain a balanced and adequate nutrition. The first thing is to ensure the intake of protein, that is, eggs, lean meat, fish, milk, soy milk, carbohydrates should also be taken in moderation, and there is no limit to vegetables. One fruit a day is enough. In short, the diet should be balanced and diversified.