Is it? I was flicking through one of those pregancy guides at the antenatal clinic when I noticed that, in the same category as liver products, they'd advised against eating sausage, because of high retinol. Now, was this a printing error, had they meant to put 'liver sausage' or do ordinary sausages contain liver, I thought not!
Have not eaten many sausages but ate a couple of supermarket packaged ones in a stew early on (about 4 weeks into pregnancy)
I've heard that eating too much nitrate, often found in processed meats like sausage, isn't good either.