Well, being my 5th pregnancy I kinda know how my body handles it. I have been working more during my pregnancy than in the first two yrs. of business. I guess you just have to gauge your body and definitely not over do it. I am due right smack dab in the busy season. So I did a Christmas in July and got all my holiday sessions booked for the rest of the year. As of right now I plan to stop about 6 weeks before my due date, but I do have a waiting list so if I feel up to it, I can add in some last minute appointments.
Good luck with the baby making!