Some brands of mayonnaise are made with raw eggs but some others have the eggs cooked first and then it's mixed in with the other ingredients to make the mayonnaise.
A few other brands of mayonnaise heat treat the eggs before using the eggs in the mayonnaise to help kill off any bacteria that can lead to salmonella.
Some delis and restaurants use uncooked eggs to make their mayonnaise so if you are pregnant then you should avoid any of that mayonnaise.
Well if you're pregnant you should avoid eating any type of mayonnaise just to be safe because most mayonnaise does use raw eggs in the ingredients.
When i was pregnant I avoided eating mayonnaise because I didn't want any complications with my baby and pregnancy.