I think she will be out in the field, I also think we may see a bit more of her in the non work environment. But this is just me guessing and thinking out loud so I coud very well be wrong.
We know that she is out of the lab at least once in 504 from that picture so that is a start. If they have written that Lindsay preganant she may not be able to do some of the lab work that she does now so she be sent in the field little more - as long as it is not a dangerous situation. Of course that doesn't mean that she wont end up in a danerous situation during her preganacy - I can think of a few possible stories like that.