Just wondered wether this type of pill will intervere with WU and how it will all together affect weight gain??Thanks

Hi, not sure how it would affect WU, but I have been taking it with single herbs and it has been fine.
As for weight gain, any kind of BCP can cause weight gain, and this is different from person to person. I personally have not gained weight from taking yasmin. You really just have to try and see for yourself, ideal would be if you could take WU for a while without being on the pill and add yasmin later, so you can see how it affects it, but if you are already on yasmin I wouldn't worry and just go for it.