Jayne, I have had this when all three births were immenent, but with Paige I had it from about half way through the pg and it got more swollen when the birth was near. It was actually my Dh who pointed it out saying that cows who are very close to birth look like this too and it is a good indicator for them to know to keep an eye on the cow. Sorry to make that comparision, but he was pretty spot on with it LOL.