Well it depends on how your practice runs. If they have a group approach to things, then odds are you would run into your old RE again, whether it be with monitoring, egg retrieval and/or egg transfer. That is assuming you are doing IVF. If your group doesn't really do the group approach, then I think it would be ok. But again, if you are doing IVF, odds are you may run into your old RE again in that he may be on call or something. And doctors cannot be there every single day so if your procedure falls on say a weekend when your new RE is not on call, again, you may run into the old one. So, to get to the point, your old RE may still "treat" you even though you have switched REs. Hope this helps.