Pregnant woman can enjoy tuna in moderation! Due the high mercury levels some canned tuna can have, it is best to watch your intake. But that doesn't mean you can't enjoy it at all! According to the FDA, pregnant women can have 2 servings of tuna a week. Here is a helpful chart explaining how much a serving is. This article also helps explain how much tuna children can have, which I find helpful because my son loves this healthy tuna salad!