Yes, you can eat prawns when pregnant, but there are a few things to keep in mind. First of all, make sure that the prawns are cooked properly. Undercooked or raw prawns can contain harmful bacteria that can cause food poisoning.
Secondly, avoid eating prawns that have been frozen and then thawed, as this can also increase the risk of food poisoning. Finally, eat prawns in moderation, as they are high in cholesterol and could potentially increase your risk of developing heart disease.