While eating fish every single day may not be ideal, choosing the right fish and eating it in moderation can be incredibly beneficial — both when trying to conceive and when you eat fish when pregnant. Research suggests that couples who include seafood regularly in their diet may experience higher conception rates compared to those who avoid it altogether.One long-term study tracking hundreds of couples found that those who ate more than two servings of seafood per week had significantly higher pregnancy success rates than those who ate less.