My son is almost 16 weeks, and I took him with me to my pdoc and T during my maternity leave. I had to take public transport to get there, so I had to wait a few weeks, which were chaos anyway, but I stayed in touch with T during that time through other means. It makes the session somewhat less productive, but it worked out well and I was happy to have both of them meet my little guy. If he got hungry I just nursed during the session or in the waiting room. Definitely talk to your T about it -- it helped me a great deal to continue to have that outlet and source of care .