I would like to know if its safe to eat cooked seafood like prawns, mussels and crayfish when pregnant and also how often can i have seafood?

Seafood + pregnant: Seafood during pregnancy could be really important, as is an important intake of omega 3, vitamin D, vitamin B12, iodine and selenium (which can be really important on the initial months of pregnancy), but it's also important to know that it may contain organic pollutants and heavy metals. That's why it's recommended 2-3 times per week (and document any adverse effect), or 300–450 g of fish p/week